Form, Fit & Function! The F3 Series Flipper from waterjet extraordinaire David Curtiss couldn't be described better. These flippers come in 3 sizes... 4", 3.5" and 2.75" blades. Featuring Dave's new S.P.O.T. (Stop Pin Over Travel) pivot system and IKBS bearings provide smooth operation. All models are titanium frame-locks with standard blasted/stonewashed finishes and diamond or frag pattern texturing. Also available with custom anodization to accent all the Ti that goes into the F3. The F3 Series from Curtiss Knives are built for hard use with quality materials fit for the long haul.