Features: Engineered for precise, this golden steel ruler positioning block features alloy construction and corrosions resistance, ensuring long term accuracy in demanding measurement tasks. The tool's markings provide clear visibility, while its reinforced edges and lightweight design enhances durability and ease of use for repetitive measuring applications. Ideal for engineers, woodworkers, laboratory technicians, and DIYer enthusiasts seeking reliabled dimensional control in metalworking, carpentry, or scientific experiments. Optimizes measurement consistency in industrial workshops, construction sites, and academic research environments where millimeter levels precise directly impacts project outcomes. As a critical addition to professional toolkits, this alloy measuring tool bridges craftsmanship and technology through its hardness rating and thermal stable calibration properties. Specifications: Component: Aluminum alloy 20MM model: size 28x8mm, suitable for ruler width 18-20mm, ruler thickness ≤1mm; 26MM model: size 36x10mm, suitable for ruler width 24-26mm, ruler thickness ≤1.5mm; 29MM model: size 42x9mm, suitable for ruler width 27-29mm, ruler thickness ≤1.5mm; 39MM model: size 48x11mm, suitable for ruler width 36-39mm, ruler thickness ≤2.3mm Package Includes: 1pcs Steel Rule Locator Block note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.