钥匙卡扣Key buckle

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。What should I do if I need to manage a single key separately? I can't puncture my belt or leather bag. Use this keychain, which can be pushed out when in use and pushed back when not in use, with rounded corners that won't hurt my hands.