This set has all the components to get you started making quick and simple dowel joints. The Fulton Doweling Jig are perfect for wood workers who want a quick, strong joint without a lot of the annoying process. Many dowel jigs make you mark on the inside edge of the joint, which means you have to transfer marks from the face of your stock to the edge, or even measure and mark with a tape measure. These dowel jigs are transparent, which means layout is much easier. Set the two pieces of stock together and mark a line across the center point of your center joint. the see thru reference lines allows you to line up the jig perfectly. Clamp the jig in place and drill.