105mm Long Drill Bits | McMaster-Carr

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







				Gold Oxide

				6.4	0.252"	105	69.9	Round	6.4 mm	Split	000000000	00000	—	———	0


				6.5	0.2559"	105	69.9	Round	6.5 mm	Split	000000000	0000	10	000000000	000000
				6.6	0.2598"	105	69.9	Round	6.6 mm	Split	000000000	0000	—	———	0
				6.7	0.2638"	105	69.9	Round	6.7 mm	Split	000000000	0000	10	000000000	00000
				6.8	0.2677"	105	69.9	Round	6.8 mm	Split	000000000	0000	10	00000000	00000
				6.9	0.2717"	105	69.9	Round	6.9 mm	Split	000000000	0000	—	———	0
				7.0	0.2756"	105	69.9	Round	7 mm	Split	000000000	0000	10	000000000	00000




						Uncoated

						6.5	0.2559"	105	62.7	Round	6.5 mm	Standard	00000000	0000	—	———	0


						7.0	0.2756"	105	69.1	Round	7 mm	Standard	00000000	0000	—	———	0

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		1-9	10-Up
Jobbers' Length







				Uncoated

				6.5	0.2559"	105	73	Round	6.5 mm	Split	0000000	000000	000000


				7.0	0.2756"	105	73	Round	7 mm	Split	0000000	00000	00000