3/8� or ½�; chuck
Spring-loaded heavy duty pilot
Guide eliminates pre-drilling
Blair 11,000-SERIES ROTABROACH CUTTERS... for heavy duty use in sheet metal &; materials up to ½�; thick. Annular tools that cut clean, burr-free, and round holes fast... unlike twist drills that push or hole saws that tear through materials. Because they hollow, no dead zone as with a twist drill, so less thrust is required and no deforming of stock or jagged edges occurs. Multiple cutting teeth, precision ground instead of stamped like whole saws, give long tool life. For body shops and frame strengtheners, custom building and detailing, aftermarket and trailer hitch installations, rust proofers and under coaters... wherever fast, rugged, and superior quality holes are required... Rotabroach 11,000-Series"; Cutters are the single answer. Patented tooth geometry also prevents chip clogging when cutting steel, sheet metal, plastic and wood.