20Pcs Watch Mainspring Winder Tool Repairing Copper Composite Wooden Box Parts. Watch mainspring winder tools including 20 different model, suitable for most watch mainspring of the market. High precise watch mainspring winder design, suitable for professional watch repairing workers to use. About 20.5cm / 8.1in of the length, 13.8cm / 5.4in width and 6cm / 2.4in height of the box, perfectly fitment for watch repairing. Copper material is corrosion resistant, strong durability, long service life, special designed for watch repairing. Wooden box makes the storage become more convenient, keep all the accessories well organized. Item Type: Watch Mainspring Winder. Material: Copper, Composite Wood. 20.5cm / 8.1in. 13.8cm / 5.4in. 6cm / 2.4in. (manual measurement, please allow a little error). Applicable Crowd: Applicable watch maintenance professionals. Application Scenario: Suitable for different size and model of watch mainspring. 1 x 8200 Mainspring Winder. 1 x 2235 Mainspring Winder. 1 x 7750 Mainspring Winder. 1 x 8500-1 Mainspring Winder. 1 x 8500-2 Mainspring Winder. 1 x 3135 Mainspring Winder. 1 x 2892 Mainspring Winder. 1 x 2000 Mainspring Winder. 1 x c7111 Mainspring Winder. 1 x 2671 Mainspring Winder. 1 x L888 Mainspring Winder. 1 x 1904-1 Mainspring Winder. 1 x 1904-2 Mainspring Winder. 1 x 1847 Mainspring Winder. 1 x 9015 Mainspring Winder. 1 x 2450 Mainspring Winder. 1 x 240 Mainspring Winder. 1 x 3120 Mainspring Winder. 1 x 899 Mainspring Winder. 1 x 2135 Mainspring Winder. 1 x Wooden Box (Box Random).