Greenlee® 11-Ton Hydraulic Knockout Kit with Hand PumpApplication:Punches holes in mild steel, stainless steel, aluminum, brass, copper, fiberglass, and plasticsSize:1/2" to 4" conduit size (0.89" to 4.54" hole size)Material:Punches up to 10 ga mild steel or 12 ga stainless steelIncludes:746A Ram, 767 Hand Pump, punches, dies, hydraulic draw studs, and carrying case SKU: GRNL.7310 Brand: GREENLEE Country of Manufacture: United States Supplier Part Number: GRNL7310