Milescraft 1310 Joint Crafter Hand Held Doweling Jig Handheld doweling jig for precise dowel alignment yielding maximum joint strength Self centering design ensures holes drilled in first board are precisely on center Guide fence locks in place to ensure holes drilled in second board are precisely aligned with first board 1/4, 5/16, 3/8-Inch dowel pin alignment slots for matching exact placement of new or existing dowel pins 1/4, 5/16, 3/8-Inch hardened steel bushings are exchangeable - Key included