Even the most experienced woodworker must face the challenge of setting the ruler accurately on the large panel project. You can try to expand the production line from a small area, but even a small mistake will lengthen the production line error.The secret is a series of precise machining refractive index and spring type that are close to the index pin. Will get to the place so you can be assured of being positioned.This is a layout tool that can be used in almost any article, even if you donot use rules.The blade has a unique Z-shaped design as our new stainless steel precision woodworking grid. There is a gap on the entire blade every six pieces.Simply insert the pencil into the groove and slide the head along the inventory edge to create a perfect parallel line.