2 1/8" Drill Bits | McMaster-Carr

Not only do these bits bore holes faster than standard smooth-finish bits, they create less friction and heat buildup to last longer. The spurred teeth have a long life, but they're less effective at guiding the bit so cuts on angled and overlapping holes tend to be rougher. Also known as multispur bits.

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.

	Max. Drilling Dp.	Shank Size	Drill Bit Point Type		Each
Black Oxide







	Quick-Change Hex Shank

	2 1/8"	2.125"	5 1/8"	—	7/16"	Screw	0000000	000000


	Uncoated







					Round Shank

					2 1/8"	2.125"	6"	4"	1/2"	Standard	0000000	00000

Carbide-Tipped Smooth-Finish Drill Bits for Wood

Carbide-Tipped Steel

Carbide tipped to stay sharp longer than tool steel bits, these are better on tough and abrasive materials, such as plywood and hardwoods. They have multiple teeth that 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.	Shank Size	Drill Bit Point Type		Each
Carbide Tipped/Uncoated







	Round Shank

	2 1/8"	2.125"	3 1/2"	3"	3/8"	Standard	0000000	000000

Extensions

		Each
5" Extension for 5/16" Shank Size	0000000	000000
10" Extension for 5/16" Shank Size	0000000	00000

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.	Shank Size	Drill Bit Point Type		Each
Uncoated







	Round Shank

	2 1/8"	2.125"	3 1/2"	3"	13/32"	Standard	0000000	000000

Extensions