Poll : switch or combo ? which is your favorite lock a key or combination ? why ?

which is your favorite lock a key or combination ?
why ?
How do you obtain rid of book mites?
Answers:    Doesn't situation to me. If I can't get within, I just pick em! I did locksmithing. Byee
Fire extinguisher?
combination, because near is no need for you to help yourself to care of a switch that you might lost. you just stipulation to always remember the combination. and most combination lock have also a key.