Application : For Bore Hardwood, Softwood, Plywood And Drywall Bit Diameter : 3/8 IN (9.500 MM) Overall Length : 6-1/4 IN (158.800 MM) Shank Size : 1/4 IN (6.400 MM) Shank Type : Hexagonal Weight : 0.090 LB (40.800 GM)