332-249AVBB Features: -3/4" Replacement draw studs. -Can be used on mild steel up through 10 gauge (3.5 mm). -Application: Punch mild steel, aluminum, fiberglass and plastic. -Use with battery-powered, hydraulic, ratchet or manual drivers. -Unique punch also splits slugs for easier slug removal. -No need to draw crosshairs or line up die alignment marks. -Self-centering punch aligns itself on pilot hole. -Hole size is outside diameter of US conduit sizes. -Draw studs must have matching Punch and die to operate.