Rub collar (sold separately) for 3/4" Arbor only!, #SC590, (D) diameter: 2-7/8, (D) bore: 1/2 & 3/4, (b) Cutting height: 1-3/4, (r) radius: 21/64, C: 1/2, L: 1/2, optional rub collar: C-008, T: 1/4, SC590 2-piece carbide Tipped 3-Wing stile & rail bead & cove exterior door 2-7/8 dia x 1-3/4 x 21/64 radius x 1/2 & 3/4 bore set for 1-3/4 Material