Economic: You can use this kit to repair the clock itself, which not only will help you save money, but will also give you joy during the repair process. It's easier to use than you think!. Clock maintenance: It is possible to add lubricating oil / waterproof oil / maintenance oil to mechanical watches through oil pens on a regular basis. The set contains no oil and is purchased separately according to your needs. A small hairbrush can also help clean the watch very well. Easy to carry: It is equipped with a hinged case, which is small, convenient to store and easy to clean for a watch and can be performed anywhere. This in watch repair tool kit will help you solve common problem, ideal for professional or home use. Wide application: Adjustment range of the oversized key is 20mm-52mm. There are 6 sets of steel teeth for common watch covers. It is easy to open various types of watch covers. This is the best choice for all watch lovers!. Perfect kit: Clock repair kit is very suitable for repairing and adjusting the clock, such as opening the back cover of the clock, replacing the clock battery, sealing strip, strap adjustment, strap replacement, watch cleaning, movement maintenance, etc.