Knockout Punch Driver Set Number of Pieces 11 Capacity 10 ga. Steel Conduit and Pipe Size 2-1/2 in to 4 In. Workpiece Material Mild Steel For Use With Hand Foot and Hydraulic Pumps Includes Punches and Dies for 2-1/2 3 3-1/2 4 in Conduit Mfr. No 7212SP-11 Case