NEIKO 10185A Step Drill Bit, 12 Steps 3/16 to 7/8 Straight High Speed Steel, Titanium Nitride Coated, 3/8 Tri Flat Step Bits for Steel, Metal, Wood, Plastic, Unibit Cone Drill Bits, Two Flute

PREMIUM STEP BIT: Each unibit is constructed of #4241 industrial high-speed steel (HSS) with a titanium nitride coating for durability and strength to punch and drill clean holes in materials like plastic, aluminum, wood, copper, stainless steel, and other types of sheet metal. , STEP DRILL BIT FOR METAL: It has a 135-degree split-point tip and features a 2-fluted spiral design that automatically deburrs and expands holes for a cleaner drilling process. With a split point tip that accelerates cutting speed, it prevents walking away from center line of bore, drilling holes in metal is fast, efficient, and clean. , STRAIGHT DESIGN: The stepped drill bit with two-flute straight grooved design cuts smooth with minimal chatter, deburrs and pulls chips up and out of the hole effectively. , TRI FLANK STEP BIT: The 3/8-inch tri flat shank is ideal for regular drill chucks like 3 jaw drills, cordless drills or drill presses. Tri flat round shanks grip better and run more concentrically for less wobble and cleaner holes. , MULTISIZE DRILL BIT: This hole drill bit can drill holes in 12 different sizes from 1/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", and 7/8".