Greenlee 28166 Slug-Splitter Self-Centering Knockout Die, 2-3/8-Inch For use with Greenlee punch 28165 and draw studs 29452 or 12099 Slug-Splitter SC heavy-duty punches are designed to punch up through 10 gauge (3.5 mm) stainless steel Self-centering punch aligns itself on pilot hole Unique punch profile also splits slugs for easier slug removal Can be used with Greenlee ratchet driver 1904 or hydraulic drivers 7646 and 7630