wolfcraft 4641404 Dowel Quick Doweling Jig Quick doweling jig that self-centers on boards to make quick, accurate dowel joints Capable of edge-to-edge, T, and edge-to-corner joints Made of high impact plastic Can be used on boards up to 1-1/4-inch thick Jig comes with 1/4-inch, 5/16-inch, and 3/8-inch diameter pins