Woodpeckers Cam-A-Line® Deluxe Drill Guide Kit combines variable spacing, precision-engraved centerlines, a robust fence and a versatile stop system to give you the most complete doweling jig on the market. Unlike other dowelling jigs, you’re not limited to a certain dimension between pins, and you don’t have to try and remember which bushings you used. Just adjust the spacing to your material and go. You have your choice four different guide bushing sizes: 1/4", 5/16", 3/8" and 1/2" diameter.