钥匙卡扣keychain

单个钥匙需要单独管理怎么办，不能戳破裤带、皮包，使用这个钥匙扣吧，用时推出，不用时推回，圆角处理不伤手。更新了螺纹螺栓。 What to do if a single key needs individual management? Avoid puncturing belts or bags—use this keychain instead. Push it out when in use and push it back when not. Rounded edges prevent hand injuries. Updated with threaded bolts.