Greenlee® - Slug-Buster Knockout Punch Unit - 1" (25.4 mm)Includes: Punch, Die, and Draw StudCapacity: 14 Gauge Mild SteelHole Size: 1 Inch (25.4 mm)Type: Round PunchApplication: Compatible with Battery Powered, Hydraulic, and Ratchet Drivers SKU: GRNL.35178 Brand: GREENLEE Country of Manufacture: United States Supplier Part Number: GRNL35178 Unit of Measure: SET