Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor build/design quality

I was not happy with this product. Yes, it's inexpensive and you do get what you pay for but these did not even work. The metal is some soft steel and the jaws flex as you crimp yielding very poor crimps. Also, as this is meant for crimping pins I had assumed that the jaws would be designed correctly: one side is slightly larger than the other to crimp the insulation, and the other side, slightly smaller to crimp the bare wire. They are both the same size, even though the two piece jaw design could have easily accommodated the proper sizing, so the wire insulation gets smashed to crimp the bare wire or you don't smash the insulation and the bare wire is barely crimped.