Harder, stronger, and more wear resistant than carbide-tipped steel, solid-carbide bits maintain their sharp edges longer. They require rigid toolholding to prevent breakage and should not be used in hand-held drilling applications. The straight flutes withstand the heavy pressure necessary to penetrate hard steel. A four-facet or split point keeps the bit centered without a pilot hole. These bits are short length, also known as screw machine or stub length, which provides maximum rigidity for drilling straighter holes than jobbers'-length drill bits.

For technical drawings and 3-D models, click on a part number.

				Shank				Uncoated Carbide
Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	No. of Flutes	For Max. Hardness	Point Style		Each
Metric
Carbide Shank
3.0 mm	0.1181"	57mm	12.8mm	Round	3mm	2	Rockwell C45	Split	0000000	000000

High-Speed Steel Left-Hand Drill Bits

Black Oxide

Also known as reverse-flute bits, the flutes spiral in the opposite direction of other bits. Use in counterclockwise drilling applications such as removing broken screws. These bits are jobbers' length and have the rigidity and length required for most applications.

Black-oxide and black-and-gold-oxide drill bits produce less friction than uncoated drill bits.

				Shank
Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Point Style	For Use On	Specifications Met		Each
Metric
Black-Oxide High-Speed Steel
3.2 mm	0.126"	65mm	12.8mm	Round	3.2mm	Standard	Steel, Iron, Stainless Steel	DIN 338	000000000	00000

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About Drill Bits

Drill Bit Decimal Size Equivalents

Carbide Drill Bits for Hardened Steel

High-Speed Steel Left-Hand Drill Bits