The knife includes a handle portion attached to a blade with a tip at its distal end. The blade comprises four surfaces that converge to form a spine and opposing cutting edges with each surface having a concave segment, a first angled segment, a flat segment, and a second angled segment as the surface extends from the spine to the edge. Similarly, the tip includes four surfaces that converge and terminate at a point, with each surface comprising only an angled segment. Optionally, the knife includes a unique safety lanyard that has two attachment points on the handle such that a closed loop is adjustably formed around the user's hand when gripping the handle, which aids in withdrawing the knife, stabilizing the user's grip, and preventing the hand from sliding forward while in use. Optionally, the knife includes a thumb plate as an additional safeguard.