Greenlee 36490 Slug-Splitter Self-Centering Knockout Punch, 1-7/32-Inch For use with Greenlee die 36489 and draw studs 31872, 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 7804/7904 and 7646/7625