Bring your Leigh D series jig (including D4, D4R and D1258) up to D4R Pro specification with this great kit of parts. This upgrade kit for all Leigh D4 or D4R owners will enable you to produce single pass half-blind dovetails in five depths with additional cutters, you will also be able to rout two sizes of box joints, 3/8" and 3/4", with precise adjustment for fit. The following parts are included in the kit:

Single Pass Half-Blind Dovetail Spacer, Finger (Box) Joint Spacer, Single Pass Half-Blind Nylon Stop Rod, for single pass half-blind dovetails and 3/8" & 3/4" box joints. e7 Elliptical Guide Bush, Pin Wrench for e7 Guide Bush, D4R Pro User Guide which includes the instructions for each of these joints and instructions explaining how to drill your guide fingers to accept the nylon stop rod.