Victorinox Swiss Army knife.
Second that, I carry a Victorinox Farmer Model everyday.
Yes, these are a great example. I usually carry a Hiker - in fact I have it on me now. I have several others though, including my late grandfather's Rancher, made back when they were stamped "Elinox" and purchased back in about the late 50s. It rode in his pocket long enough that the red colouring on the "Alox" scales is worn off everywhere but the bottoms of the checkering. Despite regular use over the past few decades it is still perfectly functional. Clearly built to last.
