The Tool Logic SLPB2 combines a sleek, folding knife, magnesium fire starter, LED flashlight and emergency whistle all in one. 3 inch 5050 serrated folding blade Magnesium rod stores in handle. Remove and strike with knife to generate sparks for fire LED flashlight is actually the handle for the magnesium rod. Stores in knife handle. Works in or out of handle. Emergency whistle provides a loud audible signal for attracting attention.