Product details:

Hole Saws, Recessed Lighting Hole Saw, Primary Saw Application Masonry, Saw Dia. 6-3/8 In., Max. Cutting Depth 1 In., Arbor Design Not Included, Tooth Material Carbide Grit, Teeth per Inch Continuous Grit, Thread Size 5/8 In.-18, Replacement Arbor No. Mfr. No. 49-56-9100, Shank Size 7/16 In. Hex, Pilot Drill Size 1/4 In. dia. x 4 In. L, Replacement Pilot Drill No. Mfr. No. 49-56-8005, Application Drywall, Plaster, Acoustical Tile, Wood And Stucco With Mesh, Impact Rated No