133mm Long Drill Bits | McMaster-Carr

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.

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—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	Type	Size	Drill Bit Point Type	Pkg. Qty.		Pkg.
Jobbers' Length





				Black Oxide

				9.6	0.378"	133	67.8	Round	9.6 mm	Standard	1	2958A145	000000
				9.7	0.3819"	133	67.6	Round	9.7 mm	Standard	1	2958A146	00000
				9.9	0.3898"	133	67.2	Round	9.9 mm	Standard	1	2958A148	00000
				10.0	0.3937"	133	67	Round	10 mm	Standard	1	2958A149	00000
				10.0	0.3937"	133	67	Round	10 mm	Standard	10	2958A234	000000
				10.2	0.4016"	133	66.6	Round	10.2 mm	Standard	1	2958A151	00000
				10.5	0.4134"	133	66	Round	10.5 mm	Standard	1	2958A152	00000




						Titanium Nitride (TiN) Coated

						10.0	0.3937"	133	67	Round	10 mm	Standard	1	8950A26	00000
						10.2	0.4016"	133	66.6	Round	10.2 mm	Standard	1	8950A63	00000
						10.5	0.4134"	133	66	Round	10.5 mm	Standard	1	8950A27	00000




								Gold Oxide

								10.2	0.4016"	133	92.1	Round	10.2 mm	Split	1	30565A328	00000
								10.2	0.4016"	133	92.1	Round	10.2 mm	Split	5	30565A448	00000
								10.5	0.4134"	133	92.1	Round	10.5 mm	Split	1	30565A329	00000
								10.5	0.4134"	133	92.1	Round	10.5 mm	Split	5	30565A449	00000




										Uncoated

										10.5	0.4134"	133	87.3	Round	10.5 mm	Standard	1	2951A146	0000

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		Each
Jobbers' Length





				Uncoated

				9.6	0.378"	133	87	Parabolic	Round	9.6	Split	2771N789	000000
				9.7	0.3819"	133	87	Parabolic	Round	9.7	Split	2771N791	00000
				10.0	0.3937"	133	87	Parabolic	Round	10	Split	2771N63	00000
				10.1	0.3976"	133	87	Parabolic	Round	10.1	Split	2771N792	00000
				10.2	0.4016"	133	87	Parabolic	Round	10.2	Split	2771N64	00000
				10.3	0.4055"	133	87	Parabolic	Round	10.3	Split	2771N793	00000
				10.4	0.4094"	133	87	Parabolic	Round	10.4	Split	2771N794	00000
				10.6	0.4173"	133	87	Parabolic	Round	10.6	Split	2771N795	00000

Cobalt Steel Drill Bits


Jobbers' 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.

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.

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





				Titanium Nitride (TiN) Coated

				9.7	0.3819"	133	87	Round	9.7 mm	Split	5058N143	000000
				10.0	0.3937"	133	87.1	Round	10 mm	Split	5058N74	00000
				10.2	0.4016"	133	87.1	Round	10.2 mm	Split	5058N75	00000
				10.5	0.4134"	133	87	Round	10.5 mm	Split	5058N41	00000




						Titanium Aluminum Nitride (TiAlN) Coated

						10.0	0.3937"	133	72	Round	10 mm	Split	2753A179	00000
						10.2	0.4016"	133	87	Round	10.2 mm	Split	5058N148	00000




								Gold Oxide

								9.6	0.378"	133	67.8	Round	9.6 mm	Split	29355A153	00000
								9.7	0.3819"	133	67.6	Round	9.7 mm	Split	29355A154	00000
								10.0	0.3937"	133	67	Round	10 mm	Split	29355A158	00000
								10.2	0.4016"	133	66.6	Round	10.2 mm	Split	29355A159	00000
								10.5	0.4134"	133	66	Round	10.5 mm	Split	29355A161	00000

Carbide-Tipped Drill Bits

Jobbers' 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.

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





				Uncoated

				10.0	0.3937"	133	76.2	Round	10 mm	Standard	28595A81	000000
				10.0	0.3937"	133	95	Round	10 mm	Split	28595A36	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		Each
Uncoated



		10.0	0.3937"	133	94	Round	10	60°	Standard	27465A426	000000
		10.5	0.4134"	133	97	Round	10.5	60°	Standard	27465A427	00000

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		Each
Jobbers' Length





				Titanium Nitride (TiN) Coated

				10.0	0.3937"	133	87	Parabolic	Round	10	Split	7333N12	000000
				10.5	0.4134"	133	87	Parabolic	Round	10.5	Split	7333N13	00000




						Uncoated

						10.0	0.3937"	133	67	Parabolic	Round	10	Split	2754A81	00000
						10.5	0.4134"	133	66	Parabolic	Round	10.5	Split	2754A82	00000

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		Each
Jobbers' Length





				Uncoated

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

Left-Hand High-Speed Steel Drill Bits

Uncoated

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		1-9	10-Up
Jobbers' Length





				Black Oxide

				10.0	0.3937"	133	74	Round	10 mm	Standard	29855A71	000000	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		1-4	5-Up
Jobbers' Length





				Uncoated

				10.5	0.4134"	133	98	Round	10.5 mm	Split	3474A68	000000	000000