Material: The aluminum positioning ruler is made of aluminum alloy, which is strong and wear resistant, with high strength to ensure long term performance and reliabilityDesign: Positioning block has a simple design, is beautiful and practical, can be used as a ruler, limit block, and scale, is lightweight, easy to carry and store, improves work efficiencyMultiple Uses: Woodworking line scribe has various sizes from 20 cm to 60 cm/7.87 inch to 23.62 inch to choose from, which can meet your different needsAuxiliary Tools: The measuring scale tool is widely used in the woodworking industry, construction tasks, etc. It is a good tool for carpenters or other workers, saving time and effortClear Scale: The carpentry tool has clear and accurate scales, which can be used for quick measurement, can be used frequently, and provide you with accurate measurement results Specification: Material: Aluminum alloy Size Chart: Scale 20 cm/7.87 inch, Packaging size 23 cmx2.5 cmx0.5 cm/9.06 inchx0.98 inchx0.20 inch Package Includes: 1xPositioning Ruler Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.