High-quality materials: Made of anodized aluminum alloy, durable and rust-proof. High hardness, rust-proof, no corrosion, long-lasting use. Perfect 90° angle: This precise angle is designed to connect to boxes, frames, etc. Helps you align when gluing. 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 fix 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 comes in a pack of two. Professional Design: Specially designed for gluing on boxes, picture frames, shelves and outside corners, etc., which will help the square footage when gluing. 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