The Kitlock KL20 Auto Scramble Mechanical Combination Lock provides simple yet tough keyless access for your cabinet and locker applications. Equipped with an auto scrambling feature for added security and convenience. The dials automatically scramble to 0-0-0-0 when the user’s code is entered, hiding it from prying eyes. Users can set their own 4 digit code from over 10,000 combinations. There are no keys to manage so go ahead and ditch the key ring! These locks are private function only and flush mounted, ideal for personal storage in offices, schools and colleges. Bright colored indicators let you know at a glance if the lock is locked (red) or unlocked (green). A Master code retrieval key (sold separately) can be used to retrieve a forgotten code simply turning the dials individually until the correct code “clicks” into place. The KL20 is suitable for indoor only installation. If you want a high value and low cost locker solution, this one’s for you!