The Kerfmaker is a patented, innovative tool that simplifies the process of making accurately sized grooves, dados and half-lap joints. Even half-lap joints that are not at a 90° angle are very easy to make with this tool. Once it is adjusted for the cutter and stock width, it is used as a spacer against a fixed stop to accurately cut both sides of the groove. It’s perfect for cutting dados for sheet goods, which often vary in thickness, as well as box and drawer making, shoji screens and half-lap joints. Visit northwestpassagetools.com for more information.