Technical Details • 1-1/4" (32mm) MEGA Tungsten Carbide 2-1/4" deep hole saw • 2 TCT carbide teeth • Cuts wood, sheetrock, fiber cement board, plaster, fiberglass, OSB, chipboard, MDF, and other tough materials • Use any 1/2"-20 thread hole saw arbor and any standard 3-3/4" or longer pilot bit • Do NOT use with 1/2" stud drills such as Milwaukee Hole Hawg which will cause the teeth to rip off • USE on cordless drill MEDIUM to HIGH SETTING for best results