Groove edges for t-moldings, splines or biscuits, and other purposes. Rout tongue-and-groove joinery. Slotting Cutters are available with either 2-wing or 3-Wing cutters. Use in a handheld or table-mounted router., #47600, diameter (D) 5/16-24 Nf, shank (D) 1/4, overall length (L) 2-3/8, L1 1-1/4, application 2 & 3-Wing slotting assemblies, and single 4-Wing trim Cutter assemblies., B 7/8, 47600 router Arbor with hex nuts and washers 5/16-24 Nf DIA x 7/8 height x 1/4 inch Shank