Why you need this tool Fast, reliable layout and marking for crafts and trades where repeatable accuracy matters. This spring wing divider caliper makes it easy to scribe arcs, circles, dividing lines, contours and dimension marks on leather, wood and metal without guesswork. Key benefits and how it solves problems Precision adjustment: a spring tension and adjustable nut let you set and lock the leg distance quickly and accurately, supporting a maximum radius of 103 mm. Consistent settings eliminate repeated measuring and reduce layout errors. Durable, accurate tips: hardened, finely polished points made from grade carbon steel hold a sharp, wearresistant edge for crisp marks over longterm use. Stable, lockable design: the caliper locks securely on horizontal surfaces such as leather or wood, keeping the chosen radius fixed during marking and preventing slip or drift while you work. Versatile use: designed for leather processing, woodworking, metalworking and drafting tasks, it adapts to a variety of materials and jobs so you don't need multiple specialized tools. Features at a glance Functions: draw arcs and circles, mark protractors and dividing lines, create contours and dimension markings Maximum radius: 103 mm Construction: grade carbon steel with hardened, finely polished tips Adjustment: spring tension plus adjustable nut for fast, repeatable settings Locking: secure fixation on horizontal surfaces for stable marking Practical use scenarios Leatherworking: set and lock a consistent stitch line or welt cut radius across multiple pieces for uniform seams. Woodworking: scribe precise circle layouts and arc profiles for joinery, templates or decorative inlays. Metalworking and drafting: mark accurate reference points and dimension lines on sheet metal or layout plates prior to cutting or machining. Who it's for Professional craftsmen and hobbyists who need a compact, durable, and precise marking caliper for repeated layout tasks across leather, wood and metal. What to expect in everyday use Rapid, repeatable adjustments; clean, durable scribed lines; a stable tool that resists wear and keeps its setting during detailed work.