Hole Cutter, Max. Cutting Depth 3/8 in, Tooth Material Carbide Tipped, Number of Teeth 3, Thread Size 5/8 In.-18, Replacement Arbor No. Mfr. No. 300033L, Shank Size 1/2 in, Pilot Drill Size 1/4 in dia, Replacement Pilot Drill No. Mfr. No. 3087935PD, Application Stainless Steel, Steel, Copper, Brass, Aluminum, PVC, and Fiberglass, Includes Pilot Bit, Plug Ejection Spring