seller promise If the lock cylinder is broken due to high quality problems or the customer by accident destroys it, the client can observe for a refund, and the customer doesn't deserve to go back it. The lock cylinder is product of all-copper material, so the lock cylinder is terribly durable and the provider lifetime of the lock cylinder is as long as 30 years. Product List: 6 reversible keys/If you should purchase more keys now, or customize the same key to open a number of lock cylinders , please touch the seller. Key digital password:We will maintain your password forever and more keys can be copied in keeping with this password within the future. 1 Lock cylinder :(In the future, we are able to reproduction the lock cylinder opened in keeping with this key for you thru the Key digital password.) 1 screw 1 keychain 3 music & 11-pin anti-theft design High-end European regular lock cylinder.30° anti-pull design It can effectively forestall violent pullout or hammering. The cross-sectional size is shown within the figure: unit MM Special manganese metallic (anti-drilling bolt) Anti-drilling violent unlocking The complete anti-theft time of 11-pin anti-theft lock cylinder exceeds 480 minutes. (Anti-technical unlocking, anti-power drill unlocking, anti-hammering unlocking) Real pictures