Do a quality job in less time and with less potential for errors or alignment problems in mild steel– with the new Greenlee Slug-Buster SC™ knockout. What’s different? A unique, patent-pending self-centering feature that makes centering the punch on a pilot hole faster and easier, reducing rework and scrap. Just tighten down the punch on your draw stud and let our new punch center itself on the pilot hole. No more trying to line up the die alignment marks or drawing crosshairs on the box to ensure alignment. The Slug-Buster SC™ is the fastest, easiest tool for punching holes that are perfectly on center with a pilot hole, reducing layout time, rework and scrap.