I carry daily a Leatherman Skeletool. The ergonomics are cursed and no aspect is comfortable to use, but it has a knife, wire cutter, standard pliers, needle nose pliers, 4 screwdriver bits, and a bottle opener all in a small form that clips in your pocket. I've broken it 3 times and was sent a new one free, under warranty. I lost one by carelessly leaving it on a hood after using it. I tried a comparable tool from Gerber first, but bought a new Skeletool after a month or so. It's not a tool you want to use all day, but it does so much so conveniently, I can't imagine being without one.
The knife blade is only swung out to illustrate placement. It stays securely folded closed and has a seer lock when open. I bought the CX shown below so it would be easier to sharpen, but I miss the serrated section on the model I lost.
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