This is a handy lockbox. Rather than hide spare keys in the yard or garage, you can store them safely within the lockbox, and then attach the box to something permanent. A re-settable four-digit lock provides security.
It has a hardened 3/8"diameter steel shackle with an inside width of 1 5/8", allowing it to be attached to a pipe, fencepost, hasp staple, or doorknob – just as real estate agents do.
An excellent way to keep spare keys secure yet accessible.