So your climbing buddy is getting on your nerves and you’re thinking about releasing him on his own recognizance, "Touching the Void" style. This three ounce tool is here to help. The high-quality Kershaw blade is a half-serrated liner locker, useful for everything from cutting cord to spreading peanut butter.
It has a bottle opener, flat and Phillips-head screwdrivers, and the carabiner gate features a twist-lock. The blade can be flicked open one-handed, useful in many situations, and the tension is adjustable.
I’m not sure what the weight limit on the carabiner itself is; I use it only for clipping into the daisy-chain on my pack shoulder straps to keep it within reach.