Rub collar for 1-1/4" Arbor only!, #SC508, (D) diameter: 5-1/2, (D) bore: 1 & 1-1/4, (a°) angle: 23°, (B) Cutting height: 5/8, (r) radius: 1-31/32, C: 5/16, R1: 1-31/32, Optional rub collar: c-017, SC508 carbide Tipped 3-Wing shallow Ogee raised panel 1-31/32 radius x 5-1/2 dia x 5/8 x 1 & 1-1/4 bore For 3/4 material