Used to be a Buck 119 but I replaced it (well, not really *replaced* as it rides in my truck) with an F1. Also carry a Buck 501 in each of two packs. However, my always, never without it for a second, is a tiny Victorinox Classic which is carried in my pocket daily. I also placed one in my little belt pack along with a 501. My daypack, which is my main carry-out in-the-boonies pack carries the F1, a Buck 501, and a Leatherman Squirt P4. Truck also has a Leatherman Juice in the glove box.