Knockout Die, Speed Punch Standard Round, Hole Size Nominal 2.914 in, Hole Size (In. ) 2 457/500 in, Conduit and Pipe Size (In. ) 2 1/2 in, Number of Pins 0, Max. Capacity Mild Steel (Ga. ) 10, Slug Splits in Half, Falls Free from Die and Stud, Up to 3 Times Faster Setup and Disassembly, For Punching Holes in Mild Steel, Aluminum, Fiberglass or Plastic, Use With Mfr. No. 7212SP-2-1/2P, 7212SP11, LS50L or Hydraulic Ram