High grade zinc alloy fire keypad with solenoid lock and 2 override keys that is strong, provides physical protection against forced entry, and offers a 3 error code locking mode. Round shape 98mm (3.86 inch) round faceplate; please remember to check the size to match your safe box before purchase. Installation: Open with 3-8 digit 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 is suitable for home safes, lockboxes, hotel safes, cabinets, and slots. If you are not a safe technician or professional locksmith, please do not attempt installation. If you have any questions or difficulties, please and we will be happy to help. Color: As shown Material: Metal Package Contents: 1 x lock replacement Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3cm.