MULTI-PURPOSE: 45 Degree Triangular Angle Ruler can be used as a protractor, carpenter's compass, etc. It is a necessary tool for carpenters, home builders, carpenters, engineers and amateurs. HIGH PERFORMANCE: Woodworking Square Ruler each hole represents one millimeter, and the distance between two adjacent holes is 5mm. When using, find the hole corresponding to the scale, insert the pen tip into the hole, and then draw the required line. DESIGN: Double Scale Measurement Ruler adopts hollow the middle, which is suitable for your fingers to fix the ruler on the workpiece. It is easy and comfortable to place, handle or move. It is a practical auxiliary scribing tool. EASY TO USE: Right Angle Ruler can be hung and stored when it is not in use, without occupying space. The edges and corners of each triangles are polished by a special process to smoothes without hurting hands. HIGH-QUALITY MATERIAL: Carpentry Measuring Layout Tool is made of high-quality aluminum alloy material, which has strong abrasion resistance and impact resistance. The surfaces is anodized, which is not easy to damage and rust, and has a long service life. Please note: The old and the batch be randomly shipped, cannot choose the specified style The physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Red Material:Aluminum Alloy Package Contents: 1x Scribing Gauge 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.