I carry a box knife with a flip open lock blade that is replaceable. Growing up on the farm everybody carried a pocketknife, generally a Case or something like that and a pliers. Those were tools of the trade in those days. Cut more twine strings off hay and straw bales than I care to think about. Now I feel naked without a blade, and I still get to use one regularly on pallet wrapping and case tape. I also carry a nail clipper for trimming the tag end of fishing line knots, a small tape and a hook stone all the time. You never know just when you can break away for a little fishing or what size fish will bite next either.