This key is for Larson Doors only that have a key that is coded 233. This is called version two because there is a second key code that we discovered, that Larson used at one time. Your key must look exactly like the picture included in order to work in the lock. Your lock will not have a code on it and if the key is lost, we would suggest using a core/key replacement that we offer. This is used on many of the common lever handle door handles. Please see 2029780003 LARSON KEYLOCK ASSEMBLY