One Card for Multiple Locks: You can easily program one key into multiple locks and you can reset, add, or delete key cards freely. The lock uses 13.56MHz M1 cards, which are more sensitive and secure than regular 125kHz ID cards. 1.5 in RFID Detection Thickness: RFID cards can penetrate thicker wood panels (up to 38 mm). It is ideal for locking cabinets, lockers, drawers, closets, medical carts, data racks, gun storage boxes, safes, swimming pools, libraries, factories and offices, etc. Sturdy Mechanism and DIY Installation: The bolt and mortise are made of metal. They are sturdy enough for locking. No drilling, installation is easily done with screws. For any surface other than wood, it is recommended to use 3M tape for installation instead of screws. Low Power Alarm Automatic Unlock: Allows you to stay unlocked in low power. Don't worry about being locked out. The low battery status is accompanied by a long beep after opening, the lock can be used about 15 times. Replace the battery before you can use it again. Hidden Lock Invisible Style: The lock is installed inside the cabinet. Unlock the cabinet door without touching it. Keep your personal items safe. Improves child safety at home. Lock