Feature: 1. 20pcs: This total set consists of 20 pieces and is suitable for any size watch. The press fits any size back case, including metal. The screws in the center make it more sturdy and will not scratch your watch. Size 50/48mm, 46/44mm, 42/40mm, 38/36mm, 34/33mm, 32/31mm, 30/28mm, 26/24mm, 23/21mm, 20/18mm. 2. Watch Press Repair Kit: The watch case press die kit is made of premium nylon, sturdy and resistant specifically designed to close the case of a watch by itself in approximately 15 minutes. 3. Easy to Use: Newly designed die mounting allows for quick and easy replacement of the press tool. Material will not leave marks or scratches on the glass. You do not need a technician to do it. 4. Compatibility: 6 rectangular die sizes: 20, 25, 30, 35, 40, 45mm and 2 special shaped die sizes: 16/16, 20/25mm. Our watch case press kit fits almost all watches from 18mm to 50mm in diameter. 5. Application: The watch case press tool is suitable for watch repairing, case closing, etc. Easy and convenient to carry and use, necessary tools for watchmakers and watch repairing workers. Specification: Item Type: Watch Case Press Die Kit Material: Nylon. Package List: 20 x Watch Case Press Die