Grizzly C2307 - Shaper Cutter - Tongue & Groove Flooring Cutter Set, 3/4" BoreCreate your own custom flooring from standard dimensional materials with these carbide cutters. Designed for use with 5 8" and 3 4" lumber, these cutters are great for designing new floors or for creating replacement planks for repair and renovation. For use on 3 4" spindles. Tongue and groove are below center, so you can resand and finish a number of times. C2305 cutter produces a back cut bottom for super tight joints. Model C2307 Dimensions: C2305