NEIKO 10194A Step Drill Bit, 10 Steps 1/4” to 1 3/8” Straight High Speed Steel, Titanium Nitride Coated, 3/8” Tri Flat Step Bits for Steel, Metal, Wood, Plastic, Unibit Cone Drill Bits, Two Flute

Neiko Tools U.S.A. Titanium Step Drill Bit 1/4" to 1-3/8" in 1/8" Increments, Two-Flute Design for Faster, Smoother Cutting, 3 Flatted 3/8" Shank, Heat Treated HSS with Titanium Nitride Coating, Self-starting - no walking and no center punch required, Perfect for clean holes in thin materials like steel, stainless steel, copper, aluminum or plastic

• 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 10 different sizes: 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", and 1 3/8".