Knockout Punch Set For Use With Tool Type Hydraulic Maximum Sheet Metal Capacity-Steel 10 ga Includes Ratchet No Material Application Mild Steel Stainless Steel Slug Type Splitter Number of Punch/Dies Sets 9 Knockout Sizes Included 2 1/2 in 3 in 3 1/2 in 4 in Nominal Hole Size 4 in Punch Shape Circle Includes 1 1/8 in Draw Stud Carrying Case EXACT(TM) 2 1/2 in to 4 in Conduit Punches and Dies