NEIKO 10174A Step Drill Bit, 10 Steps 1/4" to 1-3/8" Straight High Speed Steel, Titanium Nitride Coated, 1/4" Quick Change 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.

QUICK-CHANGE STEP BIT. The 1/4-inch hex shank snaps into a quick change chuck or impact driver without tightening of a regular drill chuck. Makes for easy, convenient, and fast bit swaps.

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".