Function: 1. Compatible models: The watch's main spring winder is suitable for a variety of watch models, including 9015/1847/899/2135/1904-1/3120/2450/240/L888/1904-2/brass, making it an essential tool for creating watches yourself. 2. Ergonomic handle: With a handle designed according to human engineering standards, the watch's main spring winder provides a metallic touch, non-slip grip, and atwa handle, improving work efficiency. 3. Perfect for professionals: The watch winding tool set is a must-have for watch repairers, watchmakers, jewelers, and amateur enthusiasts. Excellent quality of the material guarantees maximum durability. 4. Excellent quality material: Made from wear-resistant and durable brass, this main spring winder is a reliable and practical choice for any watchmaker. Resistant to , practical and reliable. 5. Convenient and portable: Comes in a storage box, so you can find and store a variety of models. Cay set can be atwo removed and moved, which increases the user's convenience. Specification: Item Type: Watch main Matter: brass, beech wood Size of wooden box: approx. 23x10,5x4,2 cm / 9,1x4,1x1,7 inch Applies to models: for 9015/1847/899/2135/1904-1/3120/2450/240/L888/1904-2 List of packages: 1 x Storage Box 1 x Handle 10 x Tension Springs