Been using for 4 years and still works great.
KeyGuard SL-590 Punch Button Key Storage Wall Mount Lock Box, Black Finish https://www.amazon.com/dp/B00545AD2Q/ref=cm_sw_r_other_apa_i_rmH8DbMF32TDF
Lockbox
http://www.amazon.com/KeyGuard-SL-590-Punch-Button-Mount/dp/B00545AD2Q