A carbon fiber handle is made from woven carbon cloth set in resin. It is the lightest and stiffest of the common laminates, and it costs the most, largely because it is slow and wasteful to machine.
Carbon fiber has an outstanding stiffness-to-weight ratio, which is why it appears on premium lightweight folders. A carbon fiber scale can be thinner than a G10 one of the same rigidity.
The visible weave is a real part of the material, not a printed pattern. Different weaves, including twill and marbled variants, change the look considerably.
It is usually polished smooth, which makes it slippery compared with textured G10. It also chips at edges under sharp impact and the exposed fibers can be delicate.
You are paying for weight and appearance. As a working handle material it is not more durable than G10, and often slightly less. Be skeptical of listings advertising it as toughness.
The term is not academic here. 26 of the products currently on our shelves describe this feature in their own manufacturer specifications, across 6 of the nine brands we stock. Examples in stock right now include Gerber Savvy Pivot Lock CF, Böker Plus LFL07 Linerlock, Case Westline Linerlock Marble.
Everything below is pulled live from the catalog, so what you see is what is actually in the Woodlawn warehouse today.