Fast cutting in plywood, particle board, chipboard, and solid wood where a smooth finish is not required. 16T, 5/8" round arbor, 13/16" diamond knockout. 7-1/4". No. 415451DB: Blade Diameter: 7-1/4", Number Of Teeth: 16 Tooth, Blade Type: Chisel Tooth, Material: Carbide, Arbor Size: 5/8"