Built these for my garage to hold my beer...Recessed - Used on my work bench, pre drilled with a 3" (76mm) hole saw. Chaulking was used to secure in the predrilled hole.Hanging - I used this to move around my garage, wherever I was working. Completely MobileMount - My garage is done in unistrut, this allows me to mount to the unistut.If anyone needs any changes please let me know.Thanks