From the Manufacturer
The Keller Dovetail System 135-1500 Journeyman DoveTail Jig is an economical choice for the beginner or hobbyists doing small to midsize projects. The back-to-back model handles wood 1/8 to 3/4 inches thick of any width with a single template precision-milled from phenolic plate. It can cut classic, variable-spaced, acute, obtuse, compound-angled, and curved dovetails, as well as box and knuckle joints. Your jig purchase includes a phenolic guide, standard dovetail bit, straight bit, ball-bearing template guides, and fully illustrated instructions.