Step Drill Bit #1Features: Single-fluted design eliminates skidding and makes for easier resharpening Laser-etched hole size are easy-to-read and permanent Anti-skid tip eliminates the need for center punching or pilot hole drilling for most sizes Drill multiple-size holes in thin sections of metal, plastic and wood using a single bit Works in most metals (steel, brass, aluminum, copper),as well as plastic and wood Specifications: Depth Penetration for Each Step: 1/8" (3 mm) Electric Drill Size: 1/4" (6 mm) and larger Number of Hole Sizes per Bit: 13 in 1/32" (1 mm) increments Pilot Hole Required: no Quick Reference Number: 1 Size Range (Hole Diameter): 1/8" (3 mm) to 1/2" (13 mm) Weight (lbs.): .05 Product : KLEIN TOOLS STEP DRILL BIT #1 Manufacturer : KLEIN TOOLS Manufacturer Part No : 59001 UPC : 092644535017