Hydraulic Knockout Punch Driver Kit includes a 8-ton pump, 2 draw studs, a spacer, and 6 sets of punches and dies Boasts hydraulic mechanism for generating up to 8 ton of hydraulic force to make a clean punch 6 sets of punches and dies are constructed of alloy steel for high tensile strength, toughness, abrasion resistance 360° rotating head for easy operation from any angle, rotary ON/OFF knob to quickly release pressure for safety Ideal for sheet metal fabrication, electric box, wire pipeline