11.0 mm Drill Bits | McMaster-Carr

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

				11.0	0.4331"	142	72	Round	11 mm	Standard	Dormer Pramet	2958A154	000000	5	2958A235	000000




						Titanium Nitride (TiN) Coated

						11.0	0.4331"	142	72	Round	11 mm	Standard	Dormer Pramet	8950A64	00000	—	———	0




								Uncoated

								11.0	0.4331"	140	93.7	Round	11 mm	Standard	Viking Norseman Drill	2951A147	0000	—	———	0




										Black/Gold Oxide

										11.0	0.4331"	140	99.8	Round	11 mm	Split	Viking Norseman Drill	30565A332	00000	5	30565A45	00000


										Short Length







														Black Oxide

														11.0	0.4331"	95	24.9	Round	11 mm	Split	Dormer Pramet	28255A63	00000	—	———	0




																Titanium Nitride (TiN) Coated

																11.0	0.4331"	95	48.3	Round	11 mm	Split	Dormer Pramet	2979N33	00000	—	———	0


																Extended Length







																				Black Oxide

																				11.0	0.4331"	195	128	Round	11 mm	Standard	Dormer Pramet	88455A128	00000	—	———	0

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.

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







			Black Oxide

			4.0, 5.0, 6.0, 6.5, 8.0, 9.0, 10.0, 11.0, 12.0	0.1575", 0.1969", 0.2362", 0.2559", 0.315", 0.3543", 0.3937", 0.4331", 0.4724"	65	Round/3-Flat	6.4 mm	Standard	Milwaukee	5910N19	000000

Drill Bit Drawer Cabinets

Store multiple bits of each size. These cabinets have drawers marked with the sizes and decimal equivalents. They can be stacked up to three high.

			For Drill Bit		Overall
	No. of Compartments	No. of Drawers	Size	Lg. Class	Lg.	Wd.	Ht.	Material	Features	Includes		Each
For Metric Drill Bits



		138	4	0.35 mm to 2.5 mm (Increments of 0.05 mm) 2.6 mm to 10.0 mm (Increments of 0.1 mm) 10.2 mm 10.5 mm 10.8 mm 11.0 mm 11.2 mm 11.5 mm 11.8 mm 12.0 mm 12.2 mm 12.5 mm 13.0 mm	Jobbers, Short	26"	12"	12 1/2"	Steel	Built-In Lock, Undivided bottom drawer for general storage	Two Keys	8922A44	0000000

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.

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

				11.0	0.4331"	141	94	Round	11 mm	Split	Dormer Pramet	5058N76	000000




						Gold Oxide

						11.0	0.4331"	142	72	Round	11 mm	Split	Dormer Pramet	29355A163	00000


						Short Length







										Uncoated

										11.0	0.4331"	95	24.9	Round	11 mm	Split	Chicago-Latrobe	2456N136	00000

Drill Bit Size Gauges

For

Metric

Measure drill bit sizes with these gauges.

For System of Measurement	For Use With	For Drill Bit Size, mm	Wd.	Ht.	Thk.	Material	Color	Mounting Hole Dia.		Each
Metric	Drills	1.5, 2.0, 2.25, 2.5, 2.75, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.25, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5	2 1/2"	6 1/2"	5/64"	Steel	Silver	1/8"	8986A64	000000

Carbide Drill Bits


Jobbers' Length Round Shank	Short Length Round Shank

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







				Uncoated

				11.0	0.4331"	114	73	Round	11 mm	Four Facet	Ultra Tool	3030A43	0000000


				Short Length







								Titanium Nitride (TiN) Coated

								11.0	0.4331"	75	32	Round	11 mm	Four Facet	Ultra Tool	27515A728	000000

Carbide-Tipped Drill Bits

Jobbers' Length

Round Shank

Short Length

Round Shank

Extended Length

Round Shank


Standard	Split

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

				11.0	0.4331"	140	81.3	Round	11 mm	Standard	Izar	28595A87	000000


				11.0	0.4331"	140	103	Round	11 mm	Split	ICS	28595A38	00000


				Short Length







								Uncoated

								11.0	0.4331"	87	33	Round	11 mm	Standard	Izar	28805A418	00000


								Extended Length







												Uncoated

												11.0	0.4331"	184	96	Round	11 mm	Standard	ICS	29465A121	00000

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







				Uncoated

				11.0	0.4331"	114	73	Round	11	140°	Brad	Fluted	Ultra Tool	2828A133	0000000

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



		11.0	0.4331"	142	102	Round	11	60°	Standard	ICS	27465A428	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

				11.0	0.4331"	143	92	Parabolic	Round	11	Split	Viking Norseman Drill	2771N65	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

				11.0	0.4331"	140	44	Round	11 mm	Notched	Izar	2973A75	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

				11.0	0.4331"	142	94	Parabolic	Round	11	Split	Dormer Pramet	7333N14	000000




						Uncoated

						11.0	0.4331"	142	72	Parabolic	Round	11	Split	Dormer Pramet	2754A83	00000

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

				11.0	0.4331"	140	103	Round	11 mm	Split	Viking Norseman Drill	3474A69	000000	000000

Depth-Limiting Drill Stops

Image of ProductInUse. Front orientation. Drill Stops.

Ensure identical hole depths every time. Position the collar on your bit and tighten the set screw.

	For Drill Bit Size Decimal Equiv.	Overall Lg.	OD	Hex Key Size for Set Screw	Material		Each
For Metric Drill Bits



	11.0 mm	0.4331"	7/8"	7/8"	1/8"	Steel	8865A228	00000