A little pricey, but apparently sturdy and well built. Not discreet! It's heavy. Requires few tools: drill, saw and if possible a vise for adapting the length of the rod "square" (actually it is of flattened cross section) to the thickness of the door. I installed that lock in addition to the existing, I appreciate not to walk my keychain for brief absences. Be careful if you have a goldfish memory: There 's no spare key! To change the code is very simple but it must separate the inner and outer parts. (Needed screwdriver).
