Description Size: 120 * 120 * 22mm (thickness 15mm) High Quality Materials: Made of anodized aluminum alloy, durable and rustproof. High hardness, rustproof, no corrosion, permanent use. PERFECT 90 ANGLE: This precise angle is designed to connect to boxes, frames, etc. Helps you align when pasting. This right angle positioner has two additional notches. The true right angles of the inner and outer squares. The base and fold in a straight line and parallelism. Note: Place a square on the corners of the two pieces to be leveled and secure it with a clamp. Metric and imperial scales. The calibration is accurate, the operation is simple, and the fragile cutting edge will not be easily damaged. Available in 12 cm, and delivered in sets of two. Professional Design: Specially designed for sticking on boxes, picture frames, shelves and outside corners, etc., which will help the square footage when sticking. The beveled edge is easy to handle and will not damage the fragile cutting edge. Wide range of applications: you will have everything you need to make boxes, drawers, cabinets, frames, furniture, etc. perfect. Some carpenters even find it useful to incorporate them into their fixtures and fittings. Satisfaction-great utility-the square of efficiency. package:2pcs Right angle ruler.