• High-quality material: The lock is made of brass, with steel shackles and comes with 3 brass keys, ensuring long-term use. • Manganese steel: Designed with a hardness of up to 65 HRC, the shackles are thicker than ordinary locks, preventing saws and scissors. • Automatic locking: No key is required to close the lock, simply press down the shackles. • Package content: Each package contains 1 lock and 3 brass keys. • Wide application: The keyed lock is versatile and widely used on exterior doors, trucks, warehouses, dormitories, offices, etc.