The RIT Arm is an adaptive device people an arm with an elbow but no wrist. It can be actuated by bending the residual elbow (video) or via a bowden cable connected to a shoulder harness (video). The arm was originally developed by e-NABLE members at Rochester Institute of Technology (video).

STL files and instructions can be found at http://youmagine.com/designs/rit-e-nable-arm-v0-43.