Milwaukee HOLE DOZER Ice Hardened Hole Saw, 1-1/8 in Dia, 1-5/8 in Cutting Depth, 3.5 TPI, 2-1/8 in Overall Length, 1/4 in Dia x 3-1/2 in L Drill, Bi-Metal/8% Cobalt Cutting Edge, Carbon Steel Body, Toothed Cutting Edge, 300/160/200/450 rpm, 3/8 in Chuck, Round Shank, Use Arbor: 49-56-6950/49-56-7000/49-56-7010/49-56-7210/49-56-7240/49-56-7250 and 49-56-9100, White, Applicable Materials: Aluminum, Cast Iron, Mild Steel, Sheet Metal and Stainless Steel