Knockout Die, Exact Line, Hole Size Nominal 2.968 In., Hole Size (In.) 2-31/32, Conduit and Pipe Size (In.) 2-1/2, Max. Capacity Mild Steel (Ga.) 10, Die: Laser Engraved Crosshairs for Clearest Alignment, and Large Size ID, Punch Tooth Geometry Splits The Slug, and It Has Gripping Surface for Faster Threading, When Used Together, Punches and Dies Knock Out Holes, Use With Professional Knockout Tools