Versatile adjustment for precise shapes - Change the shape to meet your needs by adjusting the tightness of the pen holder and nut. Each setting can be locked to ensure accurate, repeatable lines and outlines. Quality and durability - Made from high-quality aluminium alloy for strength and durability. Resistant to rust, helping extend the tool’s life in daily use. Easy to carry - Compact and lightweight, the tool fits easily in a pocket. The shirt/pants belt clip enables convenient carrying and quick storage between tasks. Easy to use - Simple operation with no complicated steps. Just adjust the nut and shaft to draw the required lines. Applications and scenarios - Woodworking, metalworking, and leathercraft: ideal for marking curved or straight guides and patterns with repeatable accuracy. - Pattern making and templating: create precise outlines for multiple parts or iterations. - DIY and professional projects: quick layout and alignment for fast, reliable marking in various materials.