4-1/4 In dia x 3-1/4 In Drill Depth Bi Metal Hole Saw

3-1/4" Drill Depth Recommended for: Steel, Copper, Aluminum, Brass, Plastic and Wood Cobalt Bi-Metal Construction Creates sharper, longer lasting teeth High Speed cutting edge Provides shock resistant teeth Resists tooth strippage 4/6 variable tooth design Thin Kerf thickness for fast and smooth cuts Better battery life when used with cordless tools