Irwin Tools 373378BX Bi-Metal 3-7/8" Hole Saw

From the Manufacturer The Irwin Tools 373378BX- Bi-Metal 3-7/8" Hole Saw is crafted from the highest quality bi-metal. This hole saw is made to be exceptionally sharp and durable for exceptional cutting and long life. With variable depth gullets, this tool is much more effficent at chip clearance and the 4/6 Variable pitch teeth reduce noise and improve performance. The Irwin hole saw is ideal for use in both wood and metal.