Features: Engineered with a built in positioning block, this aluminum woodworking marking ruler ensures precise measurements for enhanced accuracy in all your carpentry projects. The rust resistant aluminum alloy construction combines durability with lightweight handling, featuring adjustable positioning block for quick alignment and repeated marking consistency. Designed for woodworking enthusiasts and professional carpenter who demand stable tools to optimize workflow efficiency in detailed craftsmanship. Essential for furniture assembly, framing, and intricate joinery work where exact line marking determines project success and professional results. Achieve workshop mastery with this multifunctional measuring gauge that simplifies layout tasks while maintaining millimeter levels accuracy across wood surfaces and angled edges. Specifications: Component: Aluminum Dimensions: 15 cm (5.91 in) / 20 cm (7.87 in) / 30 cm (11.81 in) / 40 cm (15.75 in) / 50 cm（19.69in） Package Includes: 1xMarking Ruler 1xPositioning Block note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.