Big Horn 19625 Doweling Jig
Automatically centers when tightened down on your workpiece. Works on round, square, or irregular shaped stock up to 2 inches thick. Includes 6 bushings - 2 each -1/4 inch, 2 each 5/16 inch, and 2 each 3/8 inch. Excellent for drilling two same sized hole without having to move the jig. The jig also contains one each of 7/16 inch and 1/2 inch unbushed holes for a total of five dowel sizes.