You can use the watch case open tool for a long time as it has the features of sturdy and wear-resistant.Equipped with 12 claws feet (3 pieces each of round/arc/square/semicircle), it is sutiable for opening different case.It is made of high-quality metal material, which is solid and durable.The length of the style A product is 13.9cm, the width is 7.2cm and the height is 2.3cm. The length of the style B product is 17.5cm, the width is 7.3cm and the height is 1.4cm.It can be used to open the watch groove back cover to change the battery, and it is suitable for watchmakers and watch repairing workers to use.Item Name: Watch Case Opener ToolMaterial: MetalOpen Size: 20-34mmFeatures: Professional, Adjustable 3 Claws, Labor-savingSize Details: Open Size: 2-3.4cm/0.79"-1.34" (Approx.)Style A Size: 13.9cm x 7.2cm x 2.3cm/5.47" x 2.83" x 0.91" (Approx.)Style B Size: 17.5cm x 7.3cm x 1.4cm/6.89" x 2.87" x 0.55" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Watch Case Opener Tool