Abstract: Apparatus for destroying bio-hazardous sharp metallic instruments or "sharps" typified by hypodermic needles, hemodialysis fistula and the like wherein a stationary electrified anode is in circuit making engagement with the metallic instrument to be destroyed and the later establishes short circuit engagement with a moveable grounding electrode comprising a rotatably driven annulus or spiral wheel ramp moveable across the an outer end and progressively along the lengthwise axis of the instrument such that a majority of the instrument is burned away and volatilized by short circuit current flow between the metallic instrument and the grounding electrode.