Shockwave #4 Impact Step Drill Bit, 3/16 - 7/8 In.

SHOCKWAVE™ #4 3/16 - 7/8" Impact Duty Step Bit. It is made of high-speed steel and has a 1/4" hex shank. It is designed for use with impact drivers and can be used to drill holes in a variety of materials, including metal, wood, and plastic.