Features: This steel ruler positioning block features a secure clamp for firm, not damaging grip and high vertical accuracy, ensuring precise woodworking marking in demanding environments. Crafted from premium steel for superior durability and corrosions resistance, it offer a multi functional design with a stabilizing backstops to prevent tool slippage during height measurement and verticality checks. Ideal for beginners and professional like carpentry and engineers, this ruler clamp provides support for accurate marking and measurement tasks. Perfect for use in humid, dusty workshops or mobile projects, its lightweight steel construction ensures easy portability and consistent performances during on site applications. With its innovative design, this steel ruler positioning block ensures straight lines and exact measurements every time, making it an essential woodworking marking tool for any toolkit. Specifications: Component:Steel Ruler: 330mm/12.99''x25mm/0.98''x0.9mm/0.35'' Limit block: 15.5mm/0.61''x75mm/2.95''x29mm/1.14'' Type:with Steel Ruler,without Steel Ruler Package Includes: 1Set Steel Ruler + Sliding Block or 1Piece Sliding Block note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.