Abstract: An improved survival tool comprising a large knife having double-edged recurved blade with a chisel tip and ergonomically-designed hilt and full tang and having a pair of ergonomically-designed releasably attachable scales covering the hilt and tang forming the finger guards/grips and handle of said tool, said blade being formed with a sharpened edge extending along one entire side of said recurved blade and having a false edge on the opposite side of said blade extending rearwardly from said chisel tip to a flattened portion at the belly of said blade which serves as a hammer-anvil or palm rest and having a serrated or saw-toothed concave section extending rearwardly from said flat portion of said blade to said hilt and having an elongated opening formed axially of said blade to allow insertion of a plurality of fingers to form a hand-hold, or function as a spanner or tool holder, and an opening to 1) releasably attach said tool to a sheath having a friction-fit pin that is part of said sheath, and 2) to acc