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These style of strippers are always hit and miss. Lots of them have problems cutting strands, most of them have useless backstops, won't strip certain types of insulation, marring the insulation etc.
This one is no different. I'll start with the positives:
- doesn't seem to cut strands - says it's for up to 24 gauge but I was able to strip 26 gauge beautifully - best I've seen at not marring the insulation near the strip - very clean strip. Doesn't look like the slug got ripped off, it's a clean cut strip that looks like the kind of strips coming off our expensive wire processing machines. Probably because it uses the same style V-blades instead of flat blades like most others
- The backstop is absolutely 100% useless. This is a glaring engineering failure and I'm deducting two stars just for this. Pathetically limited usable range of 8-12mm. It will not strip the VERY common 1/4" consistently without eyeballing it which takes precious time, and leaves you wide open for errors. Accurate strip length is very important in my field. This is frustrating because these could be stellar strippers if they move the backstop to the bottom side, and make it so it locks in place. As it is now, the strip length is very limited and even if you have a strip length that falls within the backstop range, it's still useless because it moves as soon as you touch it with a wire. The backstop works for 1/2" strips and that's it.
- because of the V-blade shape, only one wire can be stripped at a time. Other styles, although they kind of mess up the insulation, allow stripping of two to three wires at a time, which is a massive time saver. It's a trade off more than a negative aspect, though, because you get very nice quality strips instead.
I'm going to keep it and use it for what it's good at, which is 1/2" strips and stripping smaller gauge wires. That's it. Everything else, my other automatic strippers do faster and more accurately, due to a backstop that actually works. The marred insulation is a non-issue, since it gets covered with heat shrink or hidden inside a connector.