Most of the designs created by the community require a functional wrist that can bend at least 30 degrees in either direction as well as most or all of their palm in order to make the device function properly.
For those that have a functional wrist with a full or partial palm, this is a design that is able to function through the bending of the wrist which forces the fingers on the device to open and close. For these designs to work, recipients will need a functional wrist that can bend easily and enough palm to push against the palm portion of the design for leverage.
This is a design that is able to function through the bending of the elbow instead of the wrist. For this design to work, recipients will need a functional elbow that can bend easily and a partial to most of their forearm.
This 3d printable prosthetic finger design is ideal for those missing two finger segments, though it can be configured for either 2 or 1 knuckles. Many options are configurable, so with the right measurements and tweaking it should be adaptable to most people’s needs – though it takes some trial & error to get a perfect fit.