Although it’s primarily popular among electricians, Greenlee’s Slug-Buster punch works beautifully for cutting a perfect hole in sheet metal while exerting minimal effort — something almost anyone will end up needing to do at one time or another. And at around $30 for a basic set, there’s really no excuse not to own one.
The basic Slug-Buster set includes a draw stud, die, and a matching punch — with which you can produce a clean hole in five easy steps:
- Drill a pilot hole
- Push the draw stud through the pilot hole
- Thread the punch onto the opposite end of the draw stud
- Tighten the draw stud
As you tighten the draw stud, it pulls the punch through the material, splitting the waste material completely in half and making it easy for you to remove the waste from the die. That’s also where the Slug-Buster earns its name. (For those who want to keep the slug intact, Greenlee offers “standard” knockout punches which operate in the same manner but without splitting the slug.)
To see the Slug-Buster in action, take a look at this Greenlee demonstration video. Although the video focuses on their new self-centering punches, the operation is identical.
The smallest (1/2″) set of Slug-Busters (1/2″) start at around $30. And if you cut or drill holes into sheet metal, you can explore Greenlee’s wide variety of multiple-size kits and tool options. They also offer readily-available replacement parts, so if you dull out a punch you won’t need to reorder the whole set.