Description: 【Professional Design】: The Watch Back Case Opener Tools are specifically designed for opening watch back covers. Essential tools for watch repair and maintenance. 【Premium Material】: The Watch Back Case Remover with grooved dies are made of quality alloy material, ensuring durability and longevity even with frequent use. 【Grooved Dies Diameters】: The watch case opener wrench is with size 7cmx7.5cm/2.76inchx2.95inch, with seven different grooved dies in diameters - 3.05cm/1.20inch, 3.15cm/1.24inch, 3.25cm/1.28inch, 3.35cm/1.32inch, 3.45cm/1.36inch, 3.55cm/1.40inch and 3.65cm/1.44inch - to accommodate various watch sizes. 【Convenient Using】: The Watch Repair Tools provide a practical and efficient solution for opening watch case, suitable for both professionals and beginners. 【Package Contents】: Each package includes 1 Watch Case Opener Wrench and 7 Grooved Dies. Specification: Material: Alloy Size Chart: Wrench: 7cmx7.5cm/2.76inchx2.95inch Dies Size: 3.05cm/1.20inch, 3.15cm/1.24inch, 3.25cm/1.28inch, 3.35cm/1.32inch, 3.45cm/1.36inch, 3.55cm/1.40inch and 3.65cm/1.44inch. Package Includes: 1 Watch Case Opener Wrench 7 Grooved Dies Note: Please allow slightly errors due to manual measurement and different monitors.