Definitely a useful tool to keep around. I keep one stuck to the side of my forge to check if I’ve reached the Curry Point or non-magnetic when heat treating knives and tooling. Don’t know if it’s true or not, but some if not most of the new ones have neodymium magnets in just the ends, where the older ones were all magnetic. I’ve had mine for decades, they’re fully magnetic as far as I can tell. My grandparents fed the dogs chicken bones and ribs all the time and they never had a problem. Heck grandma would crack rib bones with her teeth to get at the marrow and suck on them. She lived to 98. Sharp bits of metal, ferrous or non ferrous is another matter though!