Reversible Jig for the Radial-Arm Saw
This reversible jig is useful when you need to cut a number of identical pieces with angled dadoes on opposite sides. The two dowels and the saw fence locate the work. Two stops clamped to the fence define the width of the dado. Once you have cut all pieces on their top sides, flip the jig end-for-end, push the dowels through to the opposite side of the jig, relocate the stops and proceed to cut the bottom dadoes.
J.A. Hiltebeitel, S. Burlington, Vt.
Fine Woodworking Magazine, June 1981 No. 28