Rub collar for 3/4" Arbor only!, #SC630, (D) diameter: 2-5/8, (D) bore: 1/2 & 3/4, (b) Cutting height: 15/16, (r) radius: 1/4, C: 7/16, D1: 1-3/4, Description: cove & full bead molding Cutter, R1: 3/16, optional rub collar: c-006sc630 carbide Tipped 3-Wing molding 1/4 x 3/16 radius x 2-5/8 dia x 15/16 x 1/2 & 3/4 bore