Build your own wood floors with this machined shaper cutter set, which ensures perfectly aligned tongue and groove flooring strips. The unique rounded edge created by these cutters makes flooring fast and easy to install, while the nail slot helps prevent splitting. Rub collar for 3/4" arbor only!, #SC450, (D) Diameter: 3-1/4, (d) Bore: 1/2 & 3/4, (B) Cutting Height: 7/8, (R) Radius: 1/8, C: 1/4, C1: 13/32, D1: 2-5/16, For Material: 5/8"-3/4", R1: 1/16, Optional Rub Collar: C029, T: 1/4, SC450 2-Piece Carbide Tipped 3-Wing Stile & Rail Flooring with Nail Slot 3-1/4 Dia x 7/8 x 1/8 x 1/16 Radius x 1/2 & 3/4 Bore Set for 5/8 to 3/4 Material