Rub collar for 3/4" Arbor only, #959, (D) diameter 3-5/8, (D) bore 1/2 & 3/4, (b) Cutting height 1, (r), adius 3/4, D1 2-1/8, Description corner round, optional rub collar c-011, 959 carbide Tipped 3-Wing corner round 3/4 radius x 3-5/8 dia x 1 x 1/2 & 3/4 bore.