Kershaw Knife Oso Sweet 1830. 3 1/2″ Blade, 4 3/8″ closed, liner lock. The Oso Sweet offers a blade of high-quality 8Cr13MoV stainless steel for toughness and edge retention. Built with the latest SpeedSafe manual assisted technology, this knife opens easily and safely. The black injection-molded glass-filled nylon handle provides a secure grip that is ideal for multi-tasking and performs well under many weather conditions.