Knockout Punch and Die Kit For Use With Tool Type Wrench (7/16 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 31/64 in Slug Type Splits in Half Falls Free from Die and Stud Punch Shape Round Number of Pieces 3 Includes Draw Stud Yes Draw Stud Diameter 1/4 in Draw Stud Length 1 7/8 in Exact Hole Diameter 49/100 in