With the reintroduction of this popular SOG knife, we have taken what made the Tsunami so great and improved it. Some of the changes are subtle – like refining the overall balance. Some are more obvious, like the grooves in our cross guards and the option of a tough TiNi coating. Finally, the beautiful Tsunami blade shape is mated perfectly with an extremely tactile diamond checkered Kraton handle. Explore this next generation of a great classic! Rarity Note: This Tsunami was only produced from 2010 – 2011 and customized by SOG as seen in the 2009 SOG Catalog (last picture). The SOG employee that customized this knife stated that less than five were customized, which makes this Tsunami especially unique and rare.