Feature: 1. Watch Repair: This watch back remover tool makes it easy to remove or unscrew the waterproof watch back cover to replace the battery or repair the watch. 2. 13 to 54mm: The jaw distance of this watch case opener can be adjusted from 13mm to 54mm, suitable for waterproof watches of different sizes. It can be used to open and close most screw in watch back cases, cannot be used for watches that pry open the bottom cover directly 3. Stainless Steel: This watch back remover adopts stainless steel material in high hardness, which is rustproof, strong and highly durable. 4. Easy Operation: You just need to fix the watch on the repair bracket or hold firmly in the hand, then roll the adjusting wheel to set the bit spacing that matches the width of the case. After installing the watch case opener, try turning the watch back cover, The cover can be opened successfully. 5. High Efficiency: This watch back case opener allows you to easily complete the battery replacement by yourself, which not only saves your time, but more importantly, you get the sense of accomplishment of maintenance. Specification: Item Type: Watch Back Remover Tool Material: Stainless Steel. Package List: 1 x Watch Back Remover Tool