If you are like me and take pride in what you build, then this jig system is what you want. You will have the ability to keep all of your boards evenly spaced because of the included spacers.The included spacers will help keep every board the same distance from the next. Also, they will help you straighten those boards that have a little bend to them. More importantly the Kreg system will allow you to keep the screw heads from showing. The Kreg Pocket Hole system allows you to drive the screws thru the side and into the bottom boards so they never show and they have a more secure hold on the top boards. Also, you will never have to worry about stepping on a screw that has worked its self partway out.