Collapsible ruler bar with a folding 6 inch extension arm that supports 6 inch or 12 inch layout requirements. When unfolded it increases the measuring distance, and when folded it saves storage space. Ergonomic to use. Embedded strong magnet for quick, stable setup on metal surfaces. No folding, no shaking, durable construction. Stainless steel needle pulling tool. The tail is screwed and attached to the ruler body for secure carry and easy access. Adjustable positioning tool. Set to the required angle, tighten the positioning nut and press the middle adjustable lever to lock for precise positioning. Key attributes - Material: stainless steel with embedded magnet - Layout options: 6 inch base with 6 inch or 12 inch extended reach - Portability: tail-mounted needle pulling tool for easy carrying - Precision: adjustable angle and locking lever for accurate positioning Use scenarios - Woodworking and cabinetry: align frames, lay out screw lines, and mark precise distances on a metal surface with the magnet holding the ruler in place. - Metal fabrication and drilling: set and lock exact angles for hole layouts and cuts, improving accuracy and repeatability. - DIY home improvement: mounting shelves, picture frames, and other projects that require precise layout and quick setup on metal or steel work surfaces. This tool emphasizes function, material quality, and reliable performance for precise layout and positioning tasks.