Slug-Splitter SC. heavy-duty punches are designed to punch up through 10 gauge (3.5 mm) stainless steel. Unique slug-splitting design and tool steel construction. Self-centering punch aligns itself on pilot hole. No need to draw crosshairs or line up die alignment marks. Unique punch profile also splits slugs for easier slug removal. Heavy-duty dies and stainless steel draw studs for longer life. Excellent abrasion resistance for punching fiberglass and plastic. Slug-Splitter SC. punch units consist of: punch, die and draw stud.