Morse Kraken, MHSTK20 (131209), 1-1/4" (32mm) diameter, carbide tipped hole saw is designed for cutting a wide range of abrasive materials. Patented tooth design provides, aggressive tooth, for better chip clearance resulting in faster cutting. Tooth pattern is ground to promote smoother cut entry and produces a reduced slug diameter, for easier slug removal. Cut fiberglass, wood, stainless steel, aluminum and composites or laminates. Not recommended for pipe cutting. One (1) hole saw per box. Seperate arbor required, use Morse MA35PSCT (139823) or MA45PSCT (139816)