In close cooperation with Crucible Industries, Spyderco developed CPM SPY27, a particle metallurgy stainless steel containing a proprietary mix of alloys, including vanadium, molybdenum, niobium, nitrogen, and cobalt. This remarkable composition, enhanced by the amplifying effects of cobalt and the state-of-the-art Crucible Particle Metallurgy process, is produced exclusively for Spyderco. This elite expression of the Manix 2 Lightweight combines its weight-saving advantages, full-service cutting power, and the strength of the Ball Bearing Lock mechanism with the enhanced edge retention and corrosion resistance of CPM SPY27.