Knockout Punch Set, Number of Pieces 10, Capacity 10 ga Stainless Steel, Conduit and Pipe Size 2-1/2 in, 3 in, 3-1/2 in, 4 in, Workpiece Material 10 ga Stainless Steel, For Use With LS100 Intelli-PUNCH 11-ton Battery Hydraulic Knockout Driver, Includes Punches and Dies for 2-1/2 in, 3 in, 3-1/2 in, 4 in Conduit, Mfg. No. 29452 Draw Stud, 1557SS Sleeve, Plastic Case