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 resistance, it a multi functional design with a stabilizing backstops to tool slippage during height measurement and verticality checks. Ideal for beginners and professional like carpentry and engineers, this ruler clamp provides 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 during on site applications. Package includes: 1Set Steel Ruler + Sliding Block or 1Piece Sliding Block, Manufacturer: RGYBAO