[PRECISE ANGLES] - Our protractor's scales are precise, clear, and easy to read. The number on the protractor is engraved with the exquisite workmanship, will not fade. [HIGH QUALITY MATERIAL] - This angle protractor is made of high quality aluminum, sturdy and durable, it is corrosion resistant, for long-term use. [EASY TO USE] - The adjustable screw design is very practical. You can rotate the ruler and tighten the screws to measure the scale better, really easy to use. [180 DEGREE ANGLES] - The angle ruler is designed with a semi protractor -Circular to measure oblique angle, and the bidirectional scales help measure angles precisely. [WIDE APPLICATION] - Suitable for DIY crafts, drawings and drawings. students, architectural design, carpenters and wood industry enthusiasts, etc. Description: - Compact size, workmanship fine, easy to use and can provides long lasting time. - Precise scale design, engraving, wear-resistant and not easy to fade. - High precision angle allows you to measure more accurately and create perfect crafts. - T-slot design, more suitable for mini table-saw. - 180 adjustable, provides high precision miter cutting for additional precise control. Specification: Ruler Length: 90mm / 3.54 inch ; T-slot Size: 180x10mm / 7.08x3.93inch Package Includes: 1 piece Angle Ruler Note: Please allow 1-3mm measuring error due to manual measurement. Due to monitor Different and different effect, the actual color of the item may be slightly from the color showed in the photos.