The Greenlee Slug-Buster knockout kit is favored by most electrical experts. This hole-making kit was made for the serious contractor or electrician, as well as the do-it-yourself handyman, coming complete with the most common size of hole-making tools--including punches, dies, and draw studs--to meet the busy electrician's needs on the construction site. The Slug-Buster knockout kit also includes a 1-inch hex ratchet for added convenience. Versatile Performance The kit's punch has a unique profile to make the electrician's hole making easier. It splits the slug in half making it extremely easy to remove. It will perform punch holes for most conduit sizes including 1/4-inch, 1/2-inch, and 3/4-inch sizes, as well as 1-inch, 1-1/4-inch, 1-1/2-inch, and 2-inch size holes. Exceptionally resourceful, the tools in the Greenlee Slug-Buster knockout kit will make holes in mild steel and in aluminum up to 10 gauge; they will also punch holes in fiberglass and plastic and can make holes for conduit with an outside diameter of 7/8 inches. Thoughtfully designed, the Slug-Buster can be used with a battery or hydraulic ratchet, as well as a manual ratchet.