interior 187 aspiration of debris occurs through the hollow interior 187 of the inner member 185 and through the lumen of the helical member to the aspiration opening 132 of the inner drive hub 130 the distal end 183 of the inner member 185 is chamfered to a sharp edge 187 for cutting the inner member 185 simultaneously rotates about its axis and translates along its axis to cut tissue the cutting surface of the distal end 183 of the inner member 185 shears the tissue for example referring to fig1 the cutting device 100 is placed tangentially against the targeted tissue such that the cutting window 170 exposes the inner member 185 to the tissue as the inner member 185 rotates and translates as shown by the arrows the tissue within the cutting window catches on the hook 174 to initiate the cut and then the cutting edge 183 of the inner member 185 shears the tissue as the inner member 185 advances to cut the tissue the cut is completed as the cutting edge 183 of the inner member 185 advances beyond the hook 174 of the cutting window 170 within the outer member 186 fig1 shows an alternative implementation of the inner member the distal end 283 of the inner member 285 may be angled.