2. Precise: High working efficiency and accurate scale to correct marking 3. The design of the ruler groove: Just limit the ruler to the required size and lock the screw for easy use 1. Easy to use: Quick and easy to draw straight lines with accurate dimensions without other cumbersome tools 4. Material: and small size, easy to store and carry. Made of Aluminum Alloy, high quality, smooth, rust-proof, and strong, not crack or deform, Weight: 0.26235009178 pounds, Manufacturer: Disttocate