The Benchmade Jungle 153BK Bolo Fixed Blade Knife Black Plain Edge. The Benchmade's 153 Jungle Bolo is a Warren Osborne design that really excels in the wild. This large and capable chopper benefits from a thick full-tang 1095 spring steel blade. The Bolo blade profile carries considerable weight at the tip for effective chopping, while the orange Santoprene handle provides the user a confident, forgiving grip. The 153 Jungle Bolo includes a leather sheath with belt loop.