This is a very cheap, plastic tool, breathe on it wrong, and it will break. BUT, for under $4, it got the job done for a fraction of the cost of taking my watch to a professional considering it got 3 watches resized, it's still in perfect working condition.  It's shown no indication of breaking, so I love it.  Even if it would have broken after resizing the 3rd watch, that would have been fine, because I still came out ahead.