Easy marking and screw placement for 2x4 lumber!! The ruler size is designed to fit the width and thickness of 2x4 lumber, making it ideal for 2x4s. It can also be used for 1x4 lumber. The main body is made of polycarbonate (resin) and is lightweight and durable. The ruler size matches the width and thickness of 2x4 lumber. Allows for drawing right-angle lines before sawing in one step. Allows for precise positioning of nails or screws at joints in one step. Allows for drawing lines for 1/2, 1/3, and 1/4 divisions on the end grain of the material. Allows for drawing lines for 2, 3, and 4-way mortise and tenon joints. • Product size (approx.): Width 90, Height 90, Depth 40 (mm) • Material: Polycarbonate • Country of origin: Japan • With centimeter scale • The ruler size matches the width and thickness of 2x4 lumber Brand Name: RAKUDA Material: Polycarbonate I opened it, but it's unused.