Sturdy Mechanism & DIY Installation The latch and mortise are made by metal.They are sturdy enough for locking.No drilling, installed by screws easily.For any non-wood surface, rmmend using 3M tape to install instead of screws.<br> Rfid Sensing Thickness 1.5 in RFID cards can penetrate through thicker wood panels (up to 38mm/1.5),It is ideal for home locking cabinets, lockers, drawers,cupboards, closets, medical carts, data racks, gun storage boxes, safesgyms,swimming pools, libraries, factories and offices,etc.with a wide range of uses.<br> One Card For Multiple Locksyou easily program one key into several locks as you wish and you can reset, add or delete key cards freely.The lock uses 13.56MHz M1 cards, which is more sensitive and secure than common 125kHz ID cards.<br> NFC & RFID SupportedThis lock works with rfid keys and supports NFC.For Android, copy your rfid key to your smartphone's wallet via NFC fucntion. For IOS, add a new transit card at wallet and then program the transit card to your lock as a nfc access card.<br> Low Power Alarm Auto-unlock Keep unlocked in low power status. Dont worry about being locked out. Low-battery status with a long beep after being opened, the lock can be used approximately 15 times.replaced the battery before it can be used again.