Metal Straight Angle Ruler for Woodworking HOrizontal Speed Square Protractor Measuring ToolFeature:1. Laser scale, clear writing, not easy to wear2. The fluorescent horizontal bulb can be used at night3. Excellent Material & Fine WorkmanshipSpecification:Material: Aluminum Alloy + Stainless Steel Size: 305*105*25mm/12.01*4.13*0.98" Application: Spirit Level, Woodworking AccessoriesInstructions for Use:To make the handle and ruler at 90 degrees, tighten the nut after the top surface of the handle is parallel to the ruler; When moving the handle, first loosen the nut and pull the handle down to loosen the handle and ruler. Ready to go. Note:Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-3mm measuring deviation due to manual measurement.1 X Angle Ruler