Product classification ① Padlock: straight, blade, copper head ② U-lock: for bicycles, electric vehicles, motorcycles, glass doors ③ Steel wire lock: car, key, password, length can be customized ④ Door lock: gear lock, external door lock, internal door lock ⑤ Smart lock: smart padlock, smart plug-in lock, smart drawer lock, smart door lock ⑥ Lock accessories: padlock cylinder, lock cylinder, steel wire rope, key, co...