Owner of the keys for over a year! After heavy use on boats and many saltwater soakings, I have put them to the test and they cannot break! They have been soaked in saltwater countless times and show no signs of rust! I always have one of the three keys with me during work hours 16 17 18 19 due to 17 19, and it has truly worn out! Backo has delivered! Quality facom! The only thing I regret is not purchasing the larger collection up to 36! I was afraid at the time since it was considerably more expensive! Now, at the first opportunity, I will get them