Cut perfect tenons faster than ever - really! This very innovative router bit from CMT provides a simple alternative to table saw based tenon jigs to create tenons for mortise and tenon joinery. The single bit consists of: Four stackable slot cutters An assortment of spacers and shims A 1/2" shank arbor The spacers and shims can be stacked in a variety of configurations to permit the user to fine-tune the gap between the cutters until it exactly matches the tenon size needed. Once the size is set, there has truly never been a faster way to make perfect tenons. Cutting offset tenons is just as easy as cutting centered tenons. Cutting angular tenons are a breeze!Cuts tenons from 3/16" to 3/8" thick Up to 1-1/16" long Maximum 1-3/8" thick stock. Includes instructional DVD. See 'Ships Direct from Manufacturer' link for warranty and return details.