If you want to change the battery of the watch or adjust the size of your watch strap or maintain the inside of the watch need in our watch repair tool kit. It comes with a beautiful blue nylon bag and contains 185 pieces, which have high quality and beautiful appearance. With our watch repair kit, you can soon repair your watch like a professional watchmaker. Functions: - Unlike other repair kits, our 185-piece watch repair tool kit is made of a high-quality and good-looking alloy, including a precision screwdriver with 5 screwdriver bits, 144 spring bar (more than other kits), watch connection pin tool set for removal, tool set for removing the watch base, a cleaning cloth and more - The adjustment range of the case opener is 19-52 mm (suitable for opening the case back up to 52 mm), 6 sets of steel teeth for watch base covers. It is easy to open different types of watch backs. - The precision 5-in-1 screwdriver w is the most needed screwdriver for watchmakers. - Kit for removing the bracelet pin for adjusting and replacing the strap. - 144 spring bar (more than other kits). Measurements - Watch strap spring pin size: 8-25 mm. - Blue nylon bag size: 207 mm x 100 mm x 50 mm. Package contents: - 3 x pin pushers (0.8 mm, 0.9 mm, 1.0 mm). - 1 x stainless steel tweezers. - 1 x adjustable case opener. - 1 x watch strap pin remover. - 3 x watch pin remover replacement pins (gold). - 2 x spring bar tool replacement tips. - 144 x spring bar tool replacement tips. - 1 x hammer. - 1 x jump bar tool with scale. - 1 x 5-in-1 screwdriver. - 4 x replacement tips for screwdrivers. - 1 x caution back lever opener. - 1 x cleaning cloth. - 1 x back lever opener. - 1 x bracelet holder. - 18 x adjustable pins for opening the case. - 1 x watch case