Irwin® 373412BX Linear Edge Variable Pitch Hole Saw, 4-1/2 in Dia, Bi-Metal Cutting Edge

Irwin® Hole Saw, Linear Edge Variable Pitch, 4-1/2 in Dia, 4/6 TPI, 5-1/2 in Overall Length, Bi-Metal Cutting Edge, Bi-Metal Body, Toothed Cutting Edge, 70 rpm, Hex Shank, 3/8 in Shank, Blue, Applicable Materials: Aluminum, Brass, Cast Iron, Mild Steel, Stainless Steel, Steel, Tool Steel, Copper and Zinc