Replacement key for Chicago Locks and CompX Locks. Key is cut and ready to work in the lock. It is a 2 sided key and the key blank used to make it is pictured for reference. Chicago keys are commonly used in vintage items such as a key for juke boxes, key for pinball machines, a replacement key on gas pumps as well as many, many other applications. The full range of codes in this series runs from H2001 to H2576