Metal keys will never go obsolete. There are things that need to be locked that will stay that way longer than batteries last. They are smaller than a keypad as well.
177 posted on 03/19/2017 7:46:31 AM PDT by GingisK
I trust a metal key more than some cheap electronics for locking things.
189 posted on 03/19/2017 9:03:56 AM PDT by wally_bert
(I didn't get where I am today by selling ice cream tasting of bookends, pumice stone & West Germany)