In a prosthesis delivery comprising a rotatable inner cannula (10) and a prosthesis releasably coupled to a proximal end of the inner cannula, the inner cannula has a first position in which the prosthesis is retained on the cannula and a second position in which the prosthesis is released, a magnet (150) being disposed on the inner cannula. A handle assembly (200) is disposed about a distal portion of the inner cannula, the handle assembly comprising a rotary collar (225) having a magnet (170) disposed on the inner surface thereof, wherein the magnet disposed on the rotatable inner cannula and the magnet disposed on the inner surface of the rotary collar have a magnetic attraction. The magnetic attraction transfers torque from rotation of the rotary collar to rotate the inner cannula from the first position to the second position to thereby release the prosthesis.
