I use the castle for the basement. The traditional lock and key, I did not want to because of the always present to wealthy key. And a combination lock is often but to operate with only two hands. In my search I have become aware of the Master Lock. For the "initial" should be attentive, in fact, and note the steps exactly. However, it is not complicated and very well described (including, video footage on the web) The lock does its job while only about 3 weeks. But has already been sufficiently exploited and it's really great to use. This can be freely selected code in its length is super. 'm Very happy with the product. Remains to be seen how the mechanics proves in the basement after a few years. So far, everything is certainly super smooth and it also does not give the impression that it is what changes.