Professional: This high-quality 147-piece watch tool set is very suitable for professional and general use and for the repair and adjustment needs of your watches. Perfect for watchmakers, collectors, beginners, etc. Multi-function: Watchmaker tool kit includes removing or opening the watch case, adjusting or replacing the watch strap, replacing the battery, seals, etc. This repair tool will help you solve your watch problem at home instead of going to a repair shop. Save money and time. . Perfect kit: for very common tasks such as opening watch backs, strap adjustment, changing watch batteries, seals, strap adjustment and more. . Portable and lightweight: The watch repair kit comes with a black nylon zip case for convenient storage, easy to maintain and get the job done from anywhere. . Frugal: With this complete set you can repair clocks yourself. This not only saves money, but also makes repairs fun for you. Its easier to use than you think .