A discectomy tool comprising:a) a cannula having an outer surface having a longitudinal bore therein, a proximal end and a distal end；b) a steering wire disposed in the longitudinal bore；c) a flexible, hollow transmission shaft disposed in the cannula, the shaft having a throughbore, a proximal end portion, a distal end portion and an outer surface having a thread extending therefrom；d) an irrigation source fluidly connected to the throughbore；e) a cutting tip attached to the distal end portion of the transmission shaft.
