Rub collar (sold separately) for 3/4" arbor only!, #SC592, (D) Diameter: 2-7/8, (d) Bore: 1/2 & 3/4, (B) Cutting Height: 2, (R) Radius: 25/64, C: 17/32, D1: 13/16, L: 9/16, Optional Rub Collar: C-007, T: 1/4SC592 2-Piece Carbide Tipped 3-Wing Stile & Rail Bead Exterior Door 2-7/8 Die x 2 x 25/64 Radius x 1/2 & 3/4 Bore Set for 1-3/4 Material