Knockout Punch, For Use With Tool Type Battery-Hydraulic, Manual-Hydraulic, Ratchet, Knockout Punch Component Included Punch, Material Application Aluminum, Brass, Copper, Fiberglass, Mild Steel, Plastic, Stainless Steel, Maximum Sheet Metal Capacity-Steel 10 ga, Nominal Hole Size 1 7/64 in, Slug Type Splits in Half; Falls Free from Die and Stud, Punch Shape Round, Number of Pieces 1, Includes Draw Stud No, Exact Hole Diameter 1 11/100 in, Maximum Sheet Metal Capacity-Aluminum 12 ga