Helps to align workpieces in 90 degree registration
Designed with a 3/8" steel pin on one arm that fits down into the pocket hole and anchors the workpiece firmly against the second workpiece to be joined
The opposite arm is fitted with a 180 swiveling pad that automatically adjusts to your material dimensions
Finish the joint by driving a screw into the adjacent pocket hole
Also great for assembling all types of box joints