Watch Waterproof Repair Tool Rear Battery Cover Key Opener for Screw Removal Description: High quality watch case opener for different. The expandable range of this three-pin box opener is max. 55 mm. It features a knurled handle for better grip and an adjustable scroll wheel. Keeps the watch in 3 positions. With this adjustable opening case, you can easily open the back case of your watch. Includes 6 sets of different types of handles, the handles will work on polygonal, slotted, hole and grooved housing. Fits most screw-on enclosures. Ideal for opening watch cases, adjusting, replacing watch batteries, gaskets, adjusting straps and more. Very convenient and easy to take anywhere and easy to use, suitable for professional and home use. Specifications: Material: metal Size: 16.5x7cm/6.5x2.8 inch The package includes: 1 piece watch case opening key 18 pieces of pins (6 sets of 3 pins)