NEIKO 10606A Step Drill Bit, 9 Steps 1/4" to 3/4" Spiral 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.

SPIRAL DESIGN. The stepped drill bit with two-flute spiral grooved design cuts smoother than a straight bit with less chatter, pulls chips up and out of the hole more effectively, runs cooler and handles thicker material and stainless steel better.

TRI FLAT 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.

INCLUDES. This step up hole drill bit has 9 different sizes engraved on the bit itself for easy readability. It can drill holes in the following sizes: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", and 3/4".