Knockout Punch and Die Kit For Use With Tool Type Battery-Hydraulic Manual-Hydraulic Wrench (1-1/4 in) Knockout Punch Component Included Punch Die and Draw Stud Material Application Aluminum Brass Copper Fiberglass Mild Steel Plastic Maximum Sheet Metal Capacity-Steel 14 ga Nominal Hole Size 1 in Slug Type Falls Free Punch Shape Square Number of Pieces 5 Includes Draw Stud Yes Draw Stud Diameter 1/2 in Draw Stud Length 4 5/8 in Exact Hole Diameter 1 in