Rub collar (sold separately) for 1-1/4" arbor only!, #SC580, (D) Diameter: 3-9/16, (d) Bore: 1 & 1-1/4, (B) Cutting Height: 1-1/2, (R) Radius: 3/16, L: 9/16, Optional Rub Collar: C-017, T: 1/4SC580 2-Piece Carbide Tipped 3-Wing Stile & Rail Ogee Cabinet Door 3-9/16 Die x 1-1/2 x 3/16 Radius x 1 & 1-1/4 Bore Set for 1-3/8 to 1-3/4 Material