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 Perfect for use in humid, dusty workshops or mobile projects, its lightweight steel construction ensures easy portability and consistent during on site applications Ideal for beginners and professional like carpentry and engineers, this ruler clamp provides for accurate marking and measurement tasks 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 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, Manufacturer: WangWeN