Rub collar for 3/4" Arbor only!, #SC407, (D) diameter: 4-5/8, (D) bore: 1/2 & 3/4, (b) Cutting height: 11/16, (r) radius: 2-1/2, B1: 7/32, C: 1-1/2, Optional rub collar: c-005, SC407 carbide Tipped 3-Wing cove raised panel 4-5/8 dia x 11/16 x 1/2 & 3/4 bore For 11/16 material