To be I thought these would be a great tool to use , but they are just too small and hard to use. Yes compact but just too fiddly.

... however I'm NOT a fan of the pass-through RJ45 plugs, they just take me personally too long thr thread them, I can do 2-3 standard RJ45's in the same time it takes me to do 1 pass-through

Just be warned - these are not for pass thru plugs as there is no cutting blade for the crimping process

So the crimps work perfectly, no flaws and I love the ergonomics however I have two issues with the tool, 1 - the release switch is quite difficult to use, I would put a leaver instead of a twist know. 2 - despite various emails, I have yet to get the cat 5 cable stripper to work, it only works on cat 6 cable, I end up using some paper to strip cat 5 so I'm guessing a manufacturing defect in either the blade or crimps themselves

Easy to use and a nice small size excellent verbena in your pocket thanks.

Best set of crimpers I have ever owned. I have a set of much more expensive knipex crimpers, however these feel so much more ergonomic when you have hundreds of ends to make off. We specialise in IP CCTV and home automation and I honestly think I have already knocked off a few days in man time in the last few weeks.

One of the best crimpers I have used.

Smaller size than most, feels like it will last an eternity and the blades are replaceable which is great…. It crimps the cables nicely but doesn’t cut the ends on a pass through cable…. So… it doesn’t matter that it’s small and compact as I have to have to carry another tool anyway! Can’t use the cable cutters to trim the ends as it cannot get close to the end of the plug dues to the crimp. Huge design flaw and I’m super annoyed that it’s came in that crap plastic wrapping that you have to cut to open as it destroys that packaging and any chance I had of returning it. The bits that work work nicely though, just a shame that the person who designed it has never actually made a pass through cable it seems. They even show a pass through cable in the advertising images….my mistake… the extra inch of cable is actually what you can expect it to leave you. My first (and last) Klein tool. Expensive mistake