Simple, lightweight, quick-to-deploy; the Leatherman Crater C33 folding knife with carbiner is as straightforward as it gets, Straight 420 HC Stainless steel blade knife, Glass-filled nylon handle, Carabiner/Bottle Opener, Belt clip.
Glass-filled Nylon: A thermoplastic material where strength is improved by adding chopped glass fibers.
This allows for excellent durability without adding significant weight.
In Leatherman knives, the glass-filled nylon handles are so strong that an inner steel frame is not required, thereby reducing weight for a lighter every day carry.(Leatherman)