Application : For Bore Hardwood, Softwood, Plywood And Drywall Bit Diameter : 1/2 IN (12.700 MM) Overall Length : 6-1/4 IN (158.800 MM) Shank Size : 1/4 IN (6.400 MM) Shank Type : Hexagonal Weight : 0.100 LB (45.300 GM)