Rub collar (sold separately) for 3/4" Arbor only, #922, (D) diameter 3-1/8, (D) bore 1/2 & 3/4, (b) Cutting height 1-3/4, (r) radius 15/64, C 17/32, D1 1-7/8, D2 2-15/16, D3 2-1/16, R1 11/32, optional rub collar C-008, c-022, 922 2-piece carbide Tipped 3-Wing stile & rail cove & bead exterior door 3-1/8 dia x 1-3/4 x 15/64 x 11/32 radius x 1/2 & 3/4 bore set for 1-3/4 Material