Available with either 1/2" and 3/4" inside diameter. Rub collar (sold separately) for 3/4" arbor only!, #SC554, (D) Diameter: 2-3/4, (d) Bore: 1/2 & 3/4, (B) Cutting Height: 1, C: 3/8, D1: 1-7/8, For Material: 5/8" - 1", L: 7/16, Optional Rub Collar: C-008, T: 1/4SC554 2-Piece Carbide Tipped 3-Wing Stile & Rail Tongue & Groove Cabinet Door 2-3/4 Die x 1 x 1/2 & 3/4 Bore Set for 5/8 to 1 Inch Material