For use in material at least 19mm (3/4") thick, these knock-down fittings let you make strong, easy-to-assemble butt joints. Install the 12mm (15/32") diameter threaded insert nut and 37.5mm (1 1/2") long dowel pin on one side of the joint, and the 15mm (19/32") diameter cross dowel on the other.
When you assemble the joint, the dowel pin fits into a through hole in the cross dowel and is locked in place with an included set screw. A sloped recess in the dowel pin draws the joint tight when you tighten the set screw. The dowel pin's tapered end makes aligning the cross dowel much easier.
Sold as a set of four fittings.