HHIP 2006-0126 1/2 Inch HSS Square Push Broach Broach Size 1/2; Broach Length 12; Pilot Diameter 17/32; Drill Size (Inch) 17/32 Length of Cut Minimum 1/2; Length of Cut Maximim 1-3/8 Broach is tapered and Ground with bright finishing. Tolerance .5005.5015 High speed steel Used for cutting square shaped hole in round pilot holes; Heavy Duty Tolerance .5005.5015