General Tools 870 E-Z Pro Aluminum Mortise & Tenon Jig KitGeneral Tools 870 Ready to use right out of the box to produce 1 4" mortise and tenon joints for cabinets, furniture and frames. Included are bushings for also producing 3 8" and 1 2" joints with other size optional spiral up cut bits(not included). Using A plunge router with the jig, woodworkers of all skill levels can cut fully aligned mortises and tenons ranging from 1 4" to 1 2" wide and from 1 to 3" long. The jig can be mounted directly on a