Straight, Double Fluted Step Drill Bits from Klein Tools provide cleaner cutting and drilling. The aluminum titanium coating is 10 times more durable than steamed black oxide for longer bit life. 3/8-Inch hex shank is durable, and has a firm, positive grip. Laser-etched markings provide quick size identification on primary holes. This step bit has 13-hole sizes from 1/8-Inch to 1/2-Inch (3.2 to 12.7 mm).

• Step bits are coated with aluminum titanium nitride and are 10 times more durable than steamed black oxide coating for longer bit life.
• Double, straight flute removes chips for clean cuts and drilling.
• Durable, 3/8-Inch hex shank provides a firm, positive grip and won't spin out in the drill.
• Laser markings are easy to read for quick size identification.
• Fast-starting, non-walking drill tip.
• For use on steel (up to 16 gauge), wood, plastic, and aluminum.
• 1/8-Inch to 1/2-Inch (3.2 to 12.7 mm), 13-Step sizes.