You don't need a Kreg Jig to build furniture but we won't build furniture without one now. The purpose of a Kreg Jig is to join two pieces of wood together using a pocket hole. The pocket holes will hide the screws and your joints will be stronger because the wood screws are drilled at an angle. We currently have the K5 model (shown in the pic below) but have used every model. The K5 is the most user friendly jig (and our favorite) but if you are on a budget, the R3 model will get the job done! Click HERE for a video tutorial on how to use a Kreg Jig! You can find our favorite model, the K5, HERE!