characteristic: The right-angle positioning ruler is with aluminum alloy material, which is exquisite, compact and portable, rust-proof and non- and can be used permanently. The laser calibration is accurate and the operation is simple and convenient. The 90 degree angle square tool can easily use 90 degree right angle wood products and save your time. Our angle clamp fixtures are essential to balanced project results. It is suitable for carpentry to measure height, fast fix right angle positioning at 90, and accurate corner marking angle. Some even very useful to incorporate them into fixtures and fixtures. Adhesive work, but can also handle complex wine rack work, and assist spraying in the adhesive process. describe: Name: right angle positioning ruler Material: Aluminum alloy colour: Red Package Contents: 1 x Right angle positioning ruler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.