From the Manufacturer
The Keller Dovetail System 135-1500 Journeyman DoveTail Jig is a cheap choice for the beginner or hobbyists doing small to midsize projects. The back-to-back model handles picket 1/8 to three/4 inches thick of any width with a single template precision-milled from phenolic plate. It could possibly cut classic, variable-spaced, acute, obtuse, compound-angled, and curved dovetails, in addition to box and knuckle joints. Your jig purchase features a phenolic guide, usual dovetail bit, straight bit, ball-bearing template guides, and completely illustrated instructions.
Be sure this fits by entering your model number.
15-inch precision-milled template
Accepts picket from 1/8 to three/4 inches thick
Accepts unlimited widths and lengths
No take a look at cuts, no wasted picket