---  To learn about what each of the above icons represents, please refer to the [Device Ratings Guide](wiki:/s/e-nable-devices/wiki/129/device-ratings-guide "Device Ratings Guide"). ---  **Designer:** Gordon Snowball **Description:** This is a prosthetic thumb designed and supplied for a recipient request. It is intended for someone missing a complete thumb from either hand but having at least proximal and middle sections of the index finger. The thumb itself is from a Phoenix hand (120%), but in this case is operated by movement of the user’s index finger, assisted if necessary by the middle finger. The design could be modified for operation using other fingers. To adjust the grip for objects of different sizes and shapes, the position of the thumb, relative to the fingers and palm, can be changed between 3 indexed positions by changing the angle between the 2 joint pivots of the thumb proximal section. Compared to the Phoenix hand, the pivot angle of the thumb has been changed to improve the grip (based upon 1st recipient preference), the length of the proximal section has been increased by 5mm and the width of the distal section increased to securely retain a size 1 rubber 'thimblette'. Fusion 360 CAD files are provided which will be necessary to customize the design for particular users, or the designer will provide customized STLs on request. There are 3 variable parameters in the CAD model (index finger diameters and joint length) but adjustments to the palm piece may also be necessary to fit the recipient. --- # **Files and Resources** **STL Files:** [Link](https://www.thingiverse.com/thing:4656961) **Source CAD Files:** [Link](https://www.thingiverse.com/thing:4656961) **Instructions:** [Link](https://www.thingiverse.com/thing:4656961) **Assembly Materials Kit:** Not available **Video Tutorials:** Not available **e-NABLE Device Color Customizer:** Not available