I believe all the variations for this product (only in name) on Amazon and E-Bay are all made by the same company. I bought two and installed one on my neighbor's truck he seldom uses to stop a dead battery problem and to fix a weak wire problem. I bought the hydraulic wire crimper from Northern Tools and made new cable eyelet ends. He had trouble originally trying to tighten it down OVER the terminal post, I said no, just tighten the handle in the exact same manner as the positive terminal, where I zip tied the handle to the side of the connector so he would be forced to do the negative cable to disconnect it. Plus, keep it tight. I showed him to slightly tighten it with the knob if loose.
It has worked out great so far, time will tell.
I read some of the one star reviews, one was a guy with a diesel Dodge with dual batteries (maybe it was dual alternators) complained they were smaller then they appeared in the ad and they melted. Yea, these are not meant for 160+ amp alternators or 2 gauge cables in a diesel truck for $10
Though I think they work finer for 120 amp and under alternators, that run a 6 gauge wire, where the electrical system is not pulling high amps (500) all at once like a diesel starter or high powered stereo will.
