Rub collar for 1-1/4" Arbor only!, #SC506, (D) diameter: 5-1/2, (D) bore: 1 & 1-1/4, (a°) angle: 13°, (B) Cutting height: 5/8, (r) radius: 13/64, optional rub collar: c-017, SC506 carbide Tipped 3-Wing traditional with radius raised panel 13 deg X 13/64 radius x 5-1/2 dia x 5/8 x 1 & 1-1/4 bore For 3/4 material