Ridgid® 81490 Hole Saw Kit, Plumber, Series 1248, 8 pc, 7/8 in to 2-5/8 in

Outperform and outlast traditional standard pitch models. Bi-metal construction with teeth made from specially hardened type M3 high speed steel. The varying teeth height and gullet sizes result in much faster cutting and longer life. Used on wood, carbon steel, cast iron, non-ferrous metal.