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 and lockboxes, hotel, cabinet, slot. 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 you. Color: As shown Material: Metal Package Contents: 1 x lock replacement Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.