I've owned similar crimpers/pliers such as these in the past and they've failed on me every time. The problem usually comes from the screws that hold the stripping mechanism in place. No such problem with these, the crimping area is solid and all moving parts are press fitted rivets or studs. No screws to strip or come loose here. The tool performs flawlessly so far, I hope to have this in my tool box for a good while yet. Awesome.