The 0990 is based on the award-winning Zero Tolerance 0999 and is an evolution of this legendary knife. Despite its skeletonized structure, the linerlock folder remains reliably strong. Other elements pay homage to the original 0999, including an exposed "floating bridge" at the top of the handle, carbon fiber scales with a front steel liner, and cutouts on the blade and blade pivot screw. Instead of a ZT logo on the blade itself, the "Zero Tolerance" lettering is subtly engraved on the backspacer. The blade made of powder-metallurgical CPM 20CV offers excellent edge retention and opens smoothly thanks to the KVT ball bearings. With deep-carry clip (tip-up/r). Made in USA.