The Drillmate Hole-Broach Metal Hole Cutters reduce the cost of producing holes using a thinner wall design to reduce power requirements, saving battery life. The M2 grade mate­rial cuts nearly 3X faster than twist drills by having less surface area contacting the material be­ing cut. The arbor fits both 3/8" or 1/2" drill chucks. The cutters will slice through up to 5/8" thick plate.