A. Ear piercers, studs and back plugs have been packaged together at the factory, and can be used after tearing off the wrapping paper. B. The built - in earrings are made of surgical grade steel, hypoallergenic, non - inflammatory, safe and hygienic. C. This product is not a precision machine, and all parts are assembled by hand. They will be automatically disassembled after finishing. If they are accidentally disassembled before use, they can be assembled again. It is not a quality problem. Please refer to the assembly method and contact customer service to request. D. This product is a one - time product and is not recommended for reuse. The reasons are as follows: Ear studs are in direct contact with blood and using them again may cause bacterial infection of the new ear piercing. Ear studs should not be used by others. E. You can pierce your ears by yourself, but since you can't see your ears, it's inconvenient to aim when piercing, and it's more likely to miss the shot. The shopkeeper suggests trying to find someone around you to help with the operation to ensure success.