【Two types of watch backs can be opened】1, Rotary opener for watches with multiple grooves on the back, the range of use is 15-60mm, you can roll the adjusting wheel to adjust the bit spacing to fit the grooves of your watch back; 2. Pry bar for watches with one slot on the back (Note: this type of watch needs to purchase additional watch pressure tool to close the watch back). | 【Two ways to adjust the watch band】There are two types of tools in the kit, metal strap remover and watch hammer, you can choose according to your preference or need. | 【Two lengths of punches】Two different pin lengths have been thoughtfully prepared: a short pin for most straps and a long pin for wider straps. The two lengths can be combined to help you remove the strap links more smoothly. | 【Watch Strap Removal Tool】In addition to removing and replacing watch bands, the watch spring bar tool is easy to use and allows you to directly measure the length of the spring bar without you having to find an additional ruler. | 【Illustrated instruction manual】The instruction manual （in English）combines pictures and words to explain to you in detail the correct way to use the tool, to avoid damage to your watch by wrong operation, and to help you solve watch problems at home.