Hole Cutters, Hole Cutter, Primary Saw Application Metal, Saw Dia. 4 1/8 in, Max. Cutting Depth 3/16 in, Arbor Design Built-In, Tooth Material Carbide Tipped, Number of Teeth 8, Shank Size 3/8 in, Pilot Drill Size 1/4 in dia, Replacement Pilot Drill No. Mfr. No. CTSP, Application Sheet Metal, Stainless Steel, Pipe, Aluminum, PVC/ABS, Plastic