High grade zinc alloy fire resistant keypad with solenoid lock and 2 override keys that is strong, durable, fire resistant, corrosion resistant, provides physical protection against forced entry, and offers a 3 error code locking mode. Rund shape 98mm (3.86 inch) round faceplate, please remember to check the size to match your safe box before you buy. Installation: Open with 3-8 digital codes that can be programmed and 3 different colors of lights indicating different states. To replace the battery, remove the keypad face by pressing the tab counterclockwise. Our digital keypad security solenoid lock replacement are suitable for home safes and lockboxes, pistol safes, hotel safes, cabinet safes, slot safes. If you are not a safe technician or professional locksmith, please do not attempt installation. If you have any questions or difficulties, please contact us and we will be happy to help you. Color: As shown Material: Metal Package Contents: 1pcs x lock replacement