Meyerco Blackie Collins Free Hand knife
Made in USA
(Last design by Blackie Collins before his untimely death and also sadly discontinued so when they're gone, they're gone forever.)
  • 2 5/8" 154CM premium stainless steel blade
  • 3 3/4" closed
  • button lock (push to open or close)
  • Glass filled nylon handle
  • stainless pocket clip 
  • Roll open blade using the ridges around the blade tang
  • in box with forever warranty
  • (This is the least expensive knife I know of with 154CM steel)
P.S. I find it easiest to pinch the knife between my thumb and middle finger pushing the button lock with my thumb, and roll the blade out with my index finger.