Feature: 1. Durable Aluminum Alloy Material: Made from aluminum alloy with a red surface oxidation treatment, these 90 degree positioning squares are rust resistant, durable, and erosion resistant. The CNC machining ensures their durability for years of use. 2. Easy to Use: These clamps are designed to be easy to use without damaging fragile cutting edges, allowing you to effortlessly create perfect 90 degree angles. It's like having an extra hand, greatly enhancing your ability to achieve true 90 degree angles. 3. Precise Measuring: These woodworking squares feature accurate scales, serving as a ruler as well. They are perfect for creating square shelving units and maintaining squareness while assembling frames. 4. Versatile and Functional: Not only do these squares ensure precise right angles, but they also serve as a measuring tool with their accurate scales. They are a versatile and essential tool for any woodworking project. 5. Wide Application Range: These woodworking clamps are specifically designed for assembling boxes, drawers, cabinets, frames, furniture cabinets, and more. They can be used together with clamps to inspect and position joints in the right angle for gluing or welding. This makes them a very practical tool that makes your woodworking projects easier. Specification: Item Type: 90 Degree Positioning Squares Material: Aluminum alloy. Package List: 1 Set x 90 Degree Positioning Square (Total 7 Accessories)