As this thread got moving when C.J. dissed the axis lock, I would like to look back at that and say, that there is no, lock out there that cant fail on a folder. I have heard of most all of them closing when not intended, for one reason or another over time, on this forum. Thats why I think folders are only a cutting tool. As a weapon its a last ditch resort and your better off to slash than stab into something with them. A small or large fixed blade with adequate guard is really the best choice when its legal. Any folder is a compromise. Realize it and deal with it. That said, the axis lock is more consistent and less of compromise. As for the rolling lock SIFU....well there is a story there, and I am not sure if its design thats a problem or the execution as they seem all better after being "fixed". Either way, great knife but a better slasher than pig sticker.