One bit, ten sizes from 1/4" to 1-3/8". HSS with titanium nitride coating and a 4-flute spiral-grooved design that clears chips from four channels simultaneously — splitting heat between four cutting points for cooler, faster, and cleaner holes.

1/4" quick-change hex shank for instant bit swaps on impact tools and standard drills.

10 Sizes: 1/4"–1-3/8" 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8". Clearly engraved sizes.

2-Flute Spiral Design Titanium nitride-coated HSS. Clears chips and reduces friction for clean, cool drilling.

1/4" Quick-Change Hex Shank Compatible with impact tools, power drills, and bench drills. Fast, secure bit changes.

What's Included

• 1× Spiral Step Drill Bit (1/4"–1-3/8")