These keys are fine (they worked on my lock, at least) except their shaft diameter is too small (probably to save a couple of cents). Near the front of the key there is a raised ring around the key shaft that is there to stop the key at the right depth when you insert it into the lock. As-is, this diameter is not big enough to keep you from just pushing the key all the way through the lock. It is then hard to find the correct depth to insert the key to then twist and work the lock. This can be fixed by winding a few layers of electrical tape around the key diameter at the ring location (have one edge of the tape at the end of the raised ring, the other edge back toward the end with the loop on it). If you do this, it will increase the diameter of the ring section enough that the key will stop in your lock at the right depth.