Knockout Punch and Die Kit For Use With Tool Type Battery-Hydraulic Manual-Hydraulic Ratchet (1 in) Knockout Punch Component Included Punch Die and Draw Stud Material Application Aluminum Brass Copper Fiberglass Mild Steel Plastic Maximum Sheet Metal Capacity-Steel 16 ga Nominal Hole Size 7/16 in Slug Type Falls Free Punch Shape #9 Panel Connector Number of Pieces 5 Includes Draw Stud Yes Draw Stud Diameter 3/8 in Draw Stud Length 3 1/2 in Exact Hole Diameter 11/25 in