Features: Accuracy Woodworking Marking Ruler with Positioning Block ensures accurate measurements for enhanced project accuracy, crafted from rust resistant aluminum alloy for lasting durability. Featuring adjustable positioning block and lightweight aluminum construction, this measuring tool combines portability with professional stability for repeatable marking tasks. Designed for woodworkers, carpenter, and enthusiasts who demand millimeter perfect alignment in furniture crafting, cabinetry, and intricate wood joinery projects. Optimize workshop efficiency when marking straight lines on lumber, cutting boards, or moldings – ideal for table cut setups, layouts, and accuracy edges routing. Engineered with a not slip base and engraved measurement scales, this aluminum marking ruler delivers scratch resistant performances for both horizontal and vertical marking applications. Specifications: Component: Aluminum alloy Dimensions: 15 cm (5.91 in) / 20 cm (7.87 in) / 30 cm (11.81 in) / 40 cm (15.75 in) / 50 cm(19.69inch) 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.