KILLER INSTINCT DSC COMPACT CROSSBOW CRANK WIDE SLED Avoid scaring wary game with the ultra-quick and silent operating Dead Silent Crank™. The DSC™ rapidly attaches and detaches in seconds to safely and silently cock your crossbow at a moment’s notice. This compact, sleek design with speed connect socket is constructed of high-strength aluminum alloys to reduce weight and ensure years of trouble-free use.