The perfect way to lock and secure suggestions, ballots, mail, money, rent checks at rental properties, or collect donations, tithes, building funds, cahritable giving, interoffice letters, mail drop. Easy wall mount holes pre-drilled in the back. Drywall anchors and screws provided. Be sure to find stud for safer installation. If your walls are concrete or brick please consider using stronger anchors/bolts if u are in an area where theft is a concern. Box weighs 7 lbs. Has ant-fishing baffle inside. Help prevent losses. Drop Box is sturday and can be used outdoors provided you have a cover for it. Made with steel sheet metal, powder coated finish white. Overall size is：W*H*D 10*16.4*4”. Door opening size is 7.5" Wide X 6.8" Tall. Lock comes with 2 keys. Multiple units buyers, keys are keyed alike for ease of management for multiple units buyers. If you need unique keys, please contact us. We stock key blanks you can order for duplication at your local locksmith. Or you can purchase a new lock with 2 keys at affordable price from us. Holes prepared on the back for easy wall mouning. Drop slot size is 8.9*0.5”. Wide enough to drop 8.5x11 papers, or as thick an object as a CD case. Tapered bottom help store content to prevent fall-out when openning the door.