Amana Tool SC555 2-PC Carbide Tipped 3-Wing Instile & Rail Adjustable Cabinet Door 2-3/8 D x 1-1/16 to 1-21/64 CH x 1/2 & 3/4 Bore Shaper Cutter Set for 5/8 to 1-1/4 Material

Carbide Tipped Mission Style & Bevel Tongue & Groove Shaper Cutters  Instile & Rail System™ designed to cut precise grooves to provide undersized plywood veneered panels with a snug, rattle-free fit. Adjust the panel groove width 3/16" to 9/32" for 1/4" plywood. 5.5mm for undersized 1/4" plywood and 5.9mm for over sized 1/4" veneered plywood. Mission style sets also available in router bits.