Greenlee® 11-Ton Hydraulic Knockout Kit with Foot PumpApplication: Punches holes in mild steel, stainless steel, aluminum, brass, copper, fiberglass, and plastics.Hole Size: 0.89" - 4.54" (22.5 mm - 115.4 mm)Conduit Size: 1/2" - 4"Material: Punches up to 10 ga mild steel or 12 ga stainless steelKit Includes: 746A Ram, 1725 Foot Pump, Slug-Buster® punches (1/2" - 2"), Standard Round punches (2-1/2" - 4"), conduit dies (1/2" - 4"), hydraulic draw studs (7/16", 3/4", 1-1/8"), carrying case SKU: GRNL.7610SB Brand: GREENLEE Country of Manufacture: United States Supplier Part Number: GRNL7610SB