Tactile key identifier

[mklotz]

My front and back door keys are mechanically identical (except for the pin lifters) so they were impossible to tell apart by feel. My solution was to drill a small hole in the body of one key and Loctite in a miniature rivet. Now I can locate the correct key without looking at them.

The rivet is placed such that, if under the thumb on my dominant hand, the key is properly oriented to enter the lock.

Obviously, the concept can be extended to multiple identical keys by using multiple rivets or rivets arranged in tactile-detectable patterns.