10mm Shank Size Drill Bits

Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.

Black/Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.

					Shank				Each		Package
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each	Pkg. Qty.		Pkg.
Jobbers' Length







				Black Oxide

				10.0	0.3937"	133	67	Round	10 mm	Standard	Dormer Pramet	2958A149	000000	10	2958A234	0000000




						Titanium Nitride (TiN) Coated

						10.0	0.3937"	133	67	Round	10 mm	Standard	Chicago-Latrobe	8950A26	00000	—	———	0




								Uncoated

								10.0	0.3937"	130	87.3	Round	10 mm	Standard	Viking Norseman Drill	2951A145	00000	—	———	0




										Black/Gold Oxide

										10.0	0.3937"	130	92.1	Round	10 mm	Split	Viking Norseman Drill	30565A327	00000	5	30565A447	00000


										Short Length







														Black Oxide

														10.0	0.3937"	89	22.9	Round	10 mm	Split	Dormer Pramet	28255A61	00000	—	———	0




																Titanium Nitride (TiN) Coated

																10.0	0.3937"	89	43.2	Round	10 mm	Split	Dormer Pramet	2979N31	00000	—	———	0


																Extended Length







																				Black Oxide

																				10.0	0.3937"	315	229.9	Round	10 mm	Standard	Dormer Pramet	88455A85	000000	—	———	0




																				Uncoated

		10.0	0.3937"																	184	100.6	Round	10 mm	Standard	Dormer Pramet	3083A186	00000	—	———	0

Cobalt Steel Drill Bits


Jobbers' Length Round Shank	Short Length Round Shank	Split

Tough and wear resistant, cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials, such as nickel.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Short Length—The most rigid bits for drilling the straightest holes.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

Titanium Aluminum Nitride (TiAlN) Coated—The hardest and most wear-resistant coating, especially at high temperatures. These bits are best for hard and abrasive materials, such as iron, titanium, and fiberglass.

Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.

Uncoated—Polished to eject chips, these are also known as bright finish bits.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Titanium Nitride (TiN) Coated

				10.0	0.3937"	133	87.1	Round	10 mm	Split	Dormer Pramet	5058N74	000000




						Titanium Aluminum Nitride (TiAlN) Coated

						10.0	0.3937"	133	72	Round	10 mm	Split	Guhring	2753A179	00000




								Gold Oxide

								10.0	0.3937"	133	67	Round	10 mm	Split	Dormer Pramet	29355A158	00000


								Short Length







												Uncoated

												10.0	0.3937"	89	23.1	Round	10 mm	Split	Chicago-Latrobe	2456N134	00000

Coolant-Fed Carbide Drill Bits

The hardest and most wear-resistant bits, these deliver coolant to reduce heat and evacuate chips. They are designed for CNC machines that supply coolant through the spindle rather than an external source, such as a hose and nozzle. Coolant flows directly from holes in the bit's tip onto the drilling surface. This speeds up cuts and leads to excellent performance in deep holes and tough materials such as stainless steel and titanium.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Maintenance Length—Shorter than jobbers' length, these bits are more rigid for less wobble when drilling hard material. Also known as mechanics’ bits.

Titanium Aluminum Nitride (TiAlN) Coated—No drill bits last longer. These are the best for high-speed, high-temperature drilling of very hard and abrasive materials, including titanium and fiberglass.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each
Jobbers' Length
Round Shank






				Titanium Aluminum Nitride (TiAlN) Coated

				8.5	0.3346"	102	61	Round	10 mm	Four Facet	Garr Tool	2396N342	0000000


				9.0	0.3543"	102	61	Round	10 mm	Four Facet	Garr Tool	2396N416	000000
				9.5	0.374"	102	61	Round	10 mm	Four Facet	Garr Tool	2396N481	000000
				10.0	0.3937"	102	61	Round	10 mm	Four Facet	Garr Tool	2396N138	000000


				Maintenance Length
				Round Shank






								Titanium Aluminum Nitride (TiAlN) Coated

								8.5	0.3346"	89	47	Round	10 mm	Four Facet	Garr Tool	2396N718	000000


								9.0	0.3543"	89	47	Round	10 mm	Four Facet	Garr Tool	2396N734	000000
								9.5	0.374"	89	88.9	Round	10 mm	Four Facet	Garr Tool	2396N757	000000
								10.0	0.3937"	89	47	Round	10 mm	Four Facet	Garr Tool	2396N63	000000

Carbide Drill Bits

The hardest and most wear-resistant drill bits you can buy. Carbide bits stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Short Length—The most rigid bits for drilling the straightest holes.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated bits, especially on materials like hardened steel, iron, and stainless steel.

Uncoated—Excellent for a range of materials but won't last as long as coated bits.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each
Jobbers' Length
Round Shank






				Titanium Nitride (TiN) Coated

				10.0	0.3937"	114	73	Round	10 mm	Four Facet	Ultra Tool	3030A87	0000000




						Uncoated

						10.0	0.3937"	114	58.4	Round	10 mm	Four Facet	Ultra Tool	3030A41	000000


						Short Length
						Round Shank






										Titanium Nitride (TiN) Coated

										10.0	0.3937"	75	32	Round	10 mm	Four Facet	Ultra Tool	27515A726	000000




												Titanium Aluminum Nitride (TiAlN) Coated

												10.0	0.3937"	75	32	Round	10 mm	Four Facet	Ultra Tool	8879A626	000000




														Uncoated

														10.0	0.3937"	75	32	Round	10 mm	Four Facet	Ultra Tool	2956A826	00000

High-Speed Steel Step Drill Bits

Standard

Drill multiple hole sizes using only one bit. These have steps with progressively larger diameters—the deeper they drill, the bigger the hole. Count the steps as you drill to achieve the proper size. These bits also deburr as they cut, so they're good for thin materials like sheet metal and plastic panels. Wear and heat resistant, high-speed steel is versatile for use on a range of materials.

Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.

			Shank
Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Type	Size	Drill Bit Point Type	Mfr.		Each







			Uncoated

			4.0, 6.0, 8.0, 10.0, 12.0, 14.0, 16.0, 18.0, 20.0, 22.0	0.1575", 0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087", 0.7874", 0.8661"	76	Hex	10 mm	Standard	Black & Decker	89275A14	000000


			6.0, 8.0, 10.0, 12.0, 14.0, 16.0, 18.0	0.2362", 0.315", 0.3937", 0.4724", 0.5512", 0.6299", 0.7087"	64	Hex	10 mm	Standard	Black & Decker	89275A13	00000

High-Speed Steel Precise-Cut Drill Bits for Wood

Wear and heat resistant, these stay sharp longer than precise-cut bits made of plain steel. The sharp center point keeps the bit from wandering during drilling to cut accurate straight and overlapping holes, even across the grain. Also known as brad-point bits.

	Max. Drilling Dp., mm	Shank Size, mm	Drill Bit Point Type	Mfr.		Each
Uncoated







	Round Shank

	10.0	0.3937"	130	90	10	Brad	Stern	28205A78	000000


	14.0	0.5512"	140	110	10	Brad	Stern	28205A83	00000
	15.0	0.5906"	140	110	10	Brad	Stern	28205A84	00000

Carbide-Tipped Drill Bits

Jobbers' Length

Round Shank

Short Length

Round Shank

Extended Length

Round Shank


Split	Standard

Performance similar to solid carbide but at a lower price point. Like carbide bits, these are stronger than cobalt and high-speed steel and maintain their sharp edges when drilling abrasive material. However, when drilling tough metals like iron and hardened steel, upgrade to carbide for longer life.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Short Length—The most rigid bits for drilling the straightest holes.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Uncoated

				10.0	0.3937"	133	76.2	Round	10 mm	Standard	Izar	28595A81	000000


				10.0	0.3937"	133	95	Round	10 mm	Split	ICS	28595A36	00000


				Short Length







								Uncoated

								10.0	0.3937"	84	30	Round	10 mm	Standard	Izar	28805A416	00000


								Extended Length







												Uncoated

												10.0	0.3937"	178	90	Round	10 mm	Standard	ICS	29465A119	00000

High-Speed Steel Drill Bits for Plastic

The precision-ground, 60° point penetrates gradually to prevent cracking and chipping. It also reduces heat that can deform the material. Use these bits for drilling into acrylic, laminate, and other plastics. They're made of wear-resistant high-speed steel.

Jobbers' Length About Jobbers' Length

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size, mm	Point Angle	Drill Bit Point Type	Mfr.		Each
Uncoated



		10.0	0.3937"	133	94	Round	10	60°	Standard	ICS	27465A426	000000

Chip-Clearing Cobalt Steel Drill Bits


Jobbers' Length Parabolic Flute Round Shank	Split

Avoid clogs and dissipate heat with cobalt bits that last at least twice as long as high-speed steel. The flutes clear chips to improve coolant flow and prevent damage to the bit and the hole. They also speed up drilling since you don't have to stop to clear the bit manually.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Uncoated—Polished to eject chips, these are also known as bright finish bits.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Uncoated

				10.0	0.3937"	133	85	Parabolic	Round	10	Split	Viking Norseman Drill	2771N63	000000

Smooth-Finish Drill Bits for Wood

Round Shank

Multiple teeth cut away large amounts of material to bore clean, flat-bottom holes in wood. The center guide point keeps the bit stable and centered for drilling straight, angled, and overlapping holes, like those used create joints. Also known as Forstner bits.

	Max. Drilling Dp., mm	Shank Size, mm	Drill Bit Point Type	Mfr.		Each
Uncoated







	Round Shank

	26.0	1.0236"	89	76.2	10	Standard	Alfa USA	2560N1	000000


	35.0	1.378"	89	76.2	10	Standard	Alfa USA	2560N2	00000

Extensions

		Each
5" Extension for 5/16" Shank Size	3216A71	000000
10" Extension for 5/16" Shank Size	3216A72	00000

Hole-Starting Carbide Drill Bits


Short Length Round Shank	Standard

Harder and more wear resistant than cobalt steel, these carbide bits create an accurate starting place in your workpiece. Cut an indent, then continue drilling with a longer bit. The indent prevents slipping so the final hole is centered and precise. Carbide stays sharp at high temperatures and faster speeds. It can be brittle, however, so these bits require a rigid machine tool holder to prevent breakage and should not be used in hand drilling applications.

Short Length—The most rigid bits for drilling the straightest holes.

Uncoated—Excellent for a range of materials but won't last as long as coated bits.

					Shank				90° Point Angle		120° Point Angle		140° Point Angle
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size, mm	Drill Bit Point Type	Mfr.		Each		Each		Each
Short Length







				Uncoated

				10	0.3937"	70	10	Round	10	Standard	Ultra Tool	2911A624	000000	2911A628	000000	2911A633	000000

Carbide Drill Bits for Carbon Fiber, Fiberglass, and Graphite

Jobbers' Length

Cut clean holes in abrasive material without fraying or delaminating the surface. Made of carbide, these bits resist wear to retain a sharp edge, even after after hundreds of cuts.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size, mm	Point Angle	Drill Bit Point Type	Bit Style	Mfr.		Each
Jobbers' Length







				Diamond Coated

				10.0	0.3937"	114	73	Round	10	140°	Brad	Fluted	Ultra Tool	3162A71	0000000




						Uncoated

						10.0	0.3937"	114	73	Round	10	140°	Brad	Fluted	Ultra Tool	2828A131	000000

Left-Hand Cobalt Steel Drill Bits

Jobbers' Length

Round Shank

Split

The flutes spiral in the opposite direction of other bits and stay sharp longer than high-speed steel. They’re primarily used to remove stripped screws. Choose a bit that’s slightly smaller than the diameter of the screw’s head. Set your power tool to rotate in reverse. Slowly drill in the center of the screw head, maintaining constant pressure. As the bit penetrates, it will catch onto the screw and reverse it out of the hole. If the screw is badly stripped, you might need to punch a starter hole. Also known as reverse-flute bits.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Uncoated—Polished to eject chips, these are also known as bright finish bits.

					Shank					Each
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		1-4	5-Up
Jobbers' Length







				Uncoated

				10.0	0.3937"	130	95	Round	10 mm	Split	Viking Norseman Drill	3474A67	000000	000000

Carbide-Tipped Drill Bits for Hardened Steel

Jobbers' Length

Round Shank

Straight flutes withstand the heavy pressure needed to penetrate hardened steel. These bits cut more aggressively and resist stress better than spiral-flute bits. A lower-priced alternative to solid carbide, they stay sharp when drilling abrasive material but won’t last as long.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Uncoated

				10.0	0.3937"	133	40	Round	10 mm	Notched	Izar	2973A73	000000

Left-Hand High-Speed Steel Drill Bits

Jobbers' Length

Round Shank

Standard

With flutes that spiral in the opposite direction of other bits, these are primarily used to remove stripped screws. Choose a bit that’s slightly smaller than the diameter of the screw’s head. Set your power tool to rotate in reverse. Slowly drill in the center of the screw head, maintaining constant pressure. As the bit penetrates, it will catch onto the screw and reverse it out of the hole. If the screw is badly stripped, you might need to punch a starter hole. Also known as reverse-flute bits. High-speed steel is the versatile choice for drilling most metals.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.

					Shank					Each
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type	Mfr.		1-9	10-Up
Jobbers' Length







				Black Oxide

				10.0	0.3937"	133	74	Round	10 mm	Standard	Dormer Pramet	29855A71	000000	000000

Hole-Starting Cobalt Steel Drill Bits

120° Point Angle

Standard

Create an accurate starting place in your workpiece. Cut an indent with these bits, then continue drilling with a longer bit. The indent prevents slipping so the final hole is centered and precise. Cobalt steel resists wear to stay sharp when cutting hard materials, such as nickel. Also known as spotting drill bits.

Short Length—The most rigid bits for drilling the straightest holes.

Uncoated—Polished to eject chips, these are also known as bright finish bits.

					Shank				90° Point Angle
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size, mm	Drill Bit Point Type	Mfr.		Each
Short Length







				Uncoated

				10.0	0.3937"	89	25.4	Round	10	Standard	Magafor	27445A93	000000

Chip-Clearing High-Speed Steel Drill Bits


Jobbers' Length Parabolic Flute Round Shank	Split

With flutes that lift chips out of the hole, you don't have to stop drilling to clear these bits manually. They improve coolant flow to dissipate heat and prevent clogs that can damage the bit and ruin the hole. High-speed steel is good for general purpose drilling in most metals.

Parabolic Flute—A U-shaped groove on the flutes cuts faster and clears chips more quickly than high-helix bits, so these are better for drilling deeper holes.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.

						Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Flute Type	Type	Size, mm	Drill Bit Point Type	Mfr.		Each
Jobbers' Length







				Titanium Nitride (TiN) Coated

				10.0	0.3937"	133	87	Parabolic	Round	10	Split	Dormer Pramet	7333N12	000000




						Uncoated

						10.0	0.3937"	133	67	Parabolic	Round	10	Split	Dormer Pramet	2754A81	00000

Carbide Drill Bits for Port Counterbores

With multiple cutting edges, these drill bits rough out port holes to the right shape for your counterbore to finish. An internal channel delivers coolant as you cut to reduce heat and flush out chips. Use these bits with CNC machines that supply coolant through the spindle. Made of carbide, they resist wear to prepare holes that are clean and accurate over time. They’re also coated with aluminum titanium nitride (AlTiN) to further reduce heat while you cut, which extends their life. Also known as step drills.

To finish the hole to size, you’ll need a port counterbore (sold separately). Add a thread mill (sold separately) to complete the hole with threads.

Short Length—The most rigid bits for drilling the straightest holes.

	Drill Bits												Port Counterbores		Thread Mills
					Shank
	For Thread Size	For Port Dash Size	Decimal Size Equiv.	Overall Lg., mm	Type	Size, mm	Drill Bit Point Type	Finish	Mil. Spec.	Mfr.		Each		Each		Each
Short Length







				SAE J1926/1

				3/8"-24	03	0.317"	89	Round	10	Four Facet	Aluminum Titanium Nitride (AlTiN) Coated	MS16142	Scientific Cutting Tools	9851N12	0000000	9869N18	0000000	5277N25	0000000




						SAE AS5202

						3/8"-24	03	0.323"	89	Round	10	Four Facet	Aluminum Titanium Nitride (AlTiN) Coated	MS33649	Scientific Cutting Tools	9851N22	000000	9869N29	000000	5277N25	000000