Buck 110. I'm on my 3rd one now. I'm a mechanic, so I use (and mis-use ) my knife numerous times every day. My current Buck has finished off hogs, trimmed tire plugs, cut off fan belts & sliced salami all in the same week. I always break off the tip by using it as a screwdriver or small prybar, so they get short & fat before their time. My wife thinks I'm nuts, but I feel naked if I leave the house without my Buck in my right front pocket. Just pinch the blade & flick your wrist & it pops open with one hand just like an automatic. DON'T LEAVE HOME WITHOUT IT !