Payment Drop Box WDB-110/WDB-110E Wall Mount
[DHO-WDB-110]

This box is a little pricey but worth the extra money if you are needing a wall mounted box that is secure. Inside the box, there are four pre-drilled holes. What I liked best is that the mounting holes are pretty big, about the size of a nickel or so. This allowed me to use much bigger screws to mount it, thus making it nearly impossible to remove from the wall. I had to use washers with the screws to make it work, but I feel very confident that the materials placed in the box by my employees will be secure and confidential.