Rub collar for 3/4" Arbor only!, #SC410, (D) diameter: 2-3/4, (D) bore: 1/2 & 3/4, (b) Cutting height: 1-3/8, (r) radius: 1/2, B1: 3/8, D1: 1-3/4, R1: 1/2, optional rub collar: c-006, T: 1/2, T1: 1/2, SC410 carbide Tipped 3-wing corner round & cove 1/2 radius x 2-3/4 dia x 1-3/8 x 1/2 & 3/4 Bore