Parameters: The size of this lock is 119 x 85mm, the distance between the left and right keyholes is 89mm, and the distance between the upper and lower keyholes is 72.5mm, making it a compact lock. Unique design: The crescent-shaped lock cylinder adopts a B-grade atomic structure, and the lock head is a B-grade cross-shaped core. A, which is very effective against theft. Key: The key is thickened to prevent sprains and breaks, the teeth are clean, the lock body is smooth, and it is equipped with 5 keys to prevent loss. Material: Made of high strength chrome iron and zinc, heat treated and hardened to prevent abrupt unlocking, impact resistance and break resistance. Wide application: This lock kit is suitable for security doors, dormitory doors, entrance and exit doors, school engineering, construction projects, hotel projects, etc.