The OSS sub-hilt fighter offers all the advantages and performance of a custom knife at a fraction of the price. For the ultimate grip, the handle guard, and sub-hilt are injection molded in one in one integral piece of Kray-Ex . This manufacturing method makes the OSS more affordable while delivering the durability, security, and control in the hand that the sub-hilt fighter is famous for. The OSI is the single edged version of our OSS. Hollow ground to a thin, ultra keen edge it's an awesome "sticker" and will cut and slash with the best of them. Extensively field tested by our President, Lynn C. Thompson, in Australia in 2007-08, it has field dressed, skinned, and "broken up" dozens and dozens of animals from wild boar to buffalo and proved to be outstandingly efficient field knife. It's also ideal for use in countries or localities that prohibit or restrict double edged knives.