An endoprobe (400) for ophthalmic microsurgical procedures including a hand-piece (150) including a motor, a cannula assembly coupled to the hand-piece, and a transmission system (127) coupling the motor to the cannula assembly is provided. The cannula assembly having an outer tube (140) and an inner tube (130) concentric with the outer tube, each able to rotate about the longitudinal axis and having a proximal end and a distal end. The transmission system rotates the outer tube in a first direction and the inner tube in a second, opposing direction about the longitudinal axis.
