Terzuola TTF-3 (I think) & a Randall Gilbreath small liner lock in my pocket, both bought in the late 80's & carried almost every day since. I've bought other customs/handmades since & carried a few days, usually just long enough to knock the new off, but always go back to the same 2 old faithfuls. Gilbreath replaced the blade on his around 1990 (used it to pry the bulb out of a halogen lite,((wired backwards, off was on)) won't ever do that again) & Bob went over his in 1997 or 8 for me. He is amazing, Fed-Exed on a Monday with a note as polite as I could about hurrying because I just wasn't right without it, Fed-Ex was back with it Wed I think,but may have been Thursday. You can't beat that.