[Premium Material]The watch mainspring winder is made of high quality material, and it not harm the watch. You can use them for a long time. [Convenient to Use]You can easily wind the watch, keeping the watch working properly. You can buy and use watch mainspring winder repair tools with confidence. [Professional Design]This watch mainspring winder set adopted ergonomic handle is non-slip, easy to grip and convenient to use. [Types]There are different types of dies, which can meet your different need. [Good Practicality]The watch mainspring winder replacement barrels ia a practical tool for watch maintenance personnel, jewelers or amateurs. Bring you a comfortable and convenient experience. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Material: Aluminum alloy + copper colour: As Shown Package Contents: 1 x Watch Mainspring Winder Repair Tools Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.