hole saw Designed for sawing holes in abrasive materials such as fiberglass, particle board, asbestos board, cast iron Carbide-tipped hole saw Designed for sawing holes in abrasive materials such as fiberglass, particle board, asbestos board, cast iron, and formica which bi-metal hole saw not work well. Diameter Inches mm Arbor Number 11/16171L, 1SL, 4L3/4191L, 1SL, 4L7/8221L, 1SL, 4L1251L ...