I agree that the silcock key is heavy and my EDC does include a Leatherman, when possible. The silcock key is for when the Leatherman isn't possible or must be checked, e.g. government buildings, airplanes, many museums, etc. I guess a needlenose pliers could also substitute, but its at least as heavy and "tools" are often banned in Government buildings. Same as to the Boker Cop Tool. If you want a smallish pry-bar, this is the muti-function bomb at a reasonable cost. Lastly, the TK-4 is easily self applied.