Rub collar (sold separately) for 1-1/4" arbor only!, #SC596, (D) Diameter: 3-17/32, (d) Bore: 1 & 1-1/4, (B) Cutting Height: 2-1/8, (R) Radius: 25/64, C: 1/2, D1: 2-17/32, For Material: 2-1/8", L: 1/2, Optional Rub Collar: C-018, T: 1/2SC596 2-Piece Carbide Tipped 3-Wing Stile & Rail Exterior Door 3-17/32 Die x 2-1/8 x 25/64 Radius x 1 & 1-1/4 Bore Set for 2-1/8 Material