Keller Dovetail Jig- Spend more time working with wood, less time adjusting tools, because the Keller Dovetail Jig is engineered requires only common sense and a router to get started. You simply clamp the Keller Templates to your workpiece, pick up your router, and start cutting. In only 2 to 5 minutes you will cut both haves of a dovetail joint. The results will be clean, precise, and snug fitting, beautiful hand-cut proportions.