------ Haidms Door Handles & Door Knobs ------ Q : Can you tell me if the black color will lose its paint over time? A : Of course not, the paint will not come off when used correctly, the quality is very goold. Q : How is the quality? Are the door locks thick? Is it easy to break? A : The quality is very good and the door lock is durable and tough. It is not easily damaged under normal use. The door lock is very thick for most doors and will not break easily. Q : Is it loud to unlock the door? How about the mute effect? How about the quality? A : The unlocking mechanism is designed to minimize noise and operate more quietly than other knobs. The parts are well sealed to minimize squeaks or unwanted sounds.Made of zinc alloy, the door lock is thick and durable. ------ Sincerely at Your Service ------