Feature: 1. COMPLETE REPAIR TOOL SET: Dies can be used with openers 5538, 5537 and 5700 for Oyster waterproof watches (for Tudor), the adapter is included. Great for opening and closing screw back case, especially for oyster model. 2. EXCELLENT MATERIAL: These watch cases openers are made of premium alloy material, stable structure, no rust, durable. It is not easy to deform and can help to open the watch cover easily. 3. WITH STORAGE BOX: The watch back case opener comes with a storage box for easy placement. Six different sizes of dies to meet different needs. Easy to store and well organized. 4. EASY TO CARRY: Due to their small size and lightweight, these watch back case remover are easy to use and carry around. A must have tool for watchmakers and watch repair workers. 5. CONVENIENT TO USE: Practical watch repair tool, this watch cases opener has an ergonomically designed handle that is simple and easy to use, comfortable to grip, saves effort and reduces fatigue. Specification: Item Type: 5538 Watch Cases Opener Material: Alloy. Package List: 6 x Watch Cases Opener1 x Handle