Recessed Lighting Hole Saw, Primary Saw Application Specialty, Tooth Material Carbide Grit, Arbor Design Not Included, Saw Dia. 3-1/8 In., Max. Cutting Depth 1 In., Application Drywall, Plaster, Acoustical Tile, Wood And Stucco With Mesh, Pitch Style Grit Edge, Thread Size 5/8 In.-18, Arbor Hole 5/8-11, Replacement Arbor No. Mfr. No. 49-56-9100, Pilot Drill Size 1/4 In. dia. x 4 In.L, Replacement Pilot Drill No. Mfr. No. 49-56-8005