Function: 1. Professional watch repair tools, suitable for watch repairers and watchmakers. 2. With fine workmanship and good details that are easy and practical to use. 3. Light and small, easy to store and carry, bring you great convenience. 4. Stainless steel material, strong and durable, not easy to deform, and has a long service life. 5. Allow you to repair your watch yourself, saving you a lot of watch repair costs. Specification: Item Type: Watch Crown Winding Tool Material: stainless steel Size: Approx. 4.5 x 80mm / 0.18 x 3.15 inches Size: Approx. 80mm / 3.15 inches Size: Approx. 6.5 x 84mm / 0.26 x 3.31 inches Size: Approx. 3 x 80mm / 0.12 x 3.15 inches Use: watch repair tools Package list: 4 x watch crown winding tools Note: Please allow small errors due to manual measurement. Thank you for your understanding.