The DEWALT 1/4-Inch Impact Ready Drill Bit is designed to be used in a 1/4-in. Hex Shank Impact Drivers to drill holes from 1/8-in. to 1/2-in. holes in metal, wood, or plastic. The patented web taper increases the rigidity of the bit to decrease the potential for bit breakage. Common users include Electricians, HVAC, Mechanicals, Electricians, Glaziers and GC's.