Nah, you can totally swing the blade open on a leatherman one-handed (use your thumb on the blade). There are some tools accessible from the outside of the leatherman that you don't need two hands to open but most of them are contained inside. It depends on which kind you get. My leatherman isn't going to help me hunt though I'll very much give you that. In fact on the page for the wingman it says everything can be opened and operated one-handed. I don't know it gets a little tough to get the interior tools out especially the correct interior tool (sometimes you end up pulling both out and then lowering the tool you don't need, this is really hard to explain without demonstrating) and some of the tools are stuff like "bottle opener" where yeah sure you can use it one-handed but your other hand's going to be busy) but anyway something to consider, i know for sure you don't need to use both hands to access all leatherman tools, given the right leatherman.