Good Accessory: Watch Case Back Opener Base is a Watch Repair Tool Bottom Lock Machine Accessory, designed to assist in the process of watch repair and maintenance. Idea for Watch Repair: Bench watch case opener base includes a lock head, and 12 locking claws, which are essential components for securely opening the back cover of your watch. Fine Workmanship: Watch Back Opener base kit also contains fixed head and base plate, providing stability during the repair process. Durable Material: The bottom lock machine accessories are made from durable materials, wear and tear resistant, to ensure longevity and reliability in use. Watchmaker Tool: It's an ideal tool for professional watchmakers, watch repairing workers, and DIY enthusiasts who enjoy working on their watches at home. Specification: Material: Plastic Packing Size: 25cmx15cm/9.84inchx5.91inch Package Includes: 1 set Watch Back Opener Base Note: Please allow slightly errors due to manual measurement and different monitors.