[Multifunctional Marker Ruler] The carpenter's square tool can be used for measuring, scribing, marking angles, etc. One ruler is multi-purpose! Allowing you to complete the work smoothly and no longer need to change tools frequently. [Quick Positioning Angle] 10 common fixed angles can be marked quickly without reading. Every 1 cm on the ruler is designed with holes for scribing. Go well with the scribing needle, you can quickly locate the angle you need. [High Precision] The 12-inch aluminum alloy angle ruler adopts a laser scale, which is clear and wear-resistant. Also easy to read. The ruler will not deform or rust even after long-term use. Ensure the accuracy and authenticity of your measurement results. [Easy to Measure] The sturdy aluminum body, also with a unique retractable metal edge support, is very helpful to stabilize the handle on any surface. You can avoid measurement errors due to jitter. The L-shaped shape is also perfect for hand holding while working. [Wide Usage]