This core changable cam lock is really easy to replace the cylinder by removable key. Come with top quality zinc alloy, it has longer service life than general lock. In addition, there are 500 key combination and people could have a better choice according to their need. Different from the traditional lock, the design of this lock keeps up with the trend of the times under the premise of ensuring the practicality. Do not worry if you lost the password by accident, this core changable cam lock provides master key for emergency opening. Due to the compact design and proper size, it is an ideal item for AD showcase, mail box & tools box, server, street kiosk etc. http://www.emakelocks.com