1. [Watch Repair Tool] Suitable for watches with single piece design, the crystal of the watch must be removed with pressure to open. 2. [Easy to Operate] Pull the tube completely out of the air pump. Press the plastic head of the air pump against the case (or case tube). Hold the case firmly, place your thumb lightly on the crystal, and push the pump hard to blow the crystal out of the watch. 3. [After-sales] If you have any questions, please get in touch with us, our service team will provide you with a professional and satisfactory service. 4. [Sturdy and Enduring] Made of plastic, it is sturdy and enduring. It is suitable for watch repair of various delicate operations. 5. [You will Receive] The watch repair tool contains 1 air pump, 5 plastic heads, 1 metal watch remover, to help you repair your watch easily.