Rub collar (sold separately) for 1-1/4" arbor only! , #SC594, (D) Diameter: 3-9/16, (d) Bore: 1 & 1-1/4, (B) Cutting Height: 2-1/16, (R) Radius: 1/4, L: 9/16, Optional Rub Collar: C-018, T: 1/4SC594 2-Piece Carbide Tipped 3-Wing Stile & Rail Ogee Exterior Door 3-9/16 Dia x 2-1/16 x 1/4 Radius x 1 & 1-1/4 Bore Set for 1-3/4 Material