Features: Efficient watch Winder Tool with alloy steel for precise handling of various watch models and brands. Ergonomic nonslip handles reduce hand fatigue during longtime use, efficient and easy to use. Great for professional watchmakers, hobbyists, and craft enthusiasts searching high precise instrument for delicate watch maintenance tasks. Perfect for repairing vintage timepieces, adjusting modern luxury watch component, or performing emergency fixes in workshops, homes, or travel use. Engineered with scratch resistant alloy steel to securely grip watch heads without damaging delicate mechanisms, ensuring professional grade results every time. Specifications: Component: Alloy Steel Product Dimension: As pictures shown Size: 2-3mm/3-4mm/4-5mm/5-6mm/6-7mm/7-8mm/8-9mm/9-10mm Package Includes: 1PC Watch crowns Winder Tool note: Please allow 1-2cm error due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.