In taking a Human Factors class we were asked to redesign a simple hand tool taking that is ideal for most to all user, including those with disabilities.  I have a rough working prototype of my screwdriver design that takes into account user issues that were gathered from various user trails, observations, and data collecting. Along with hands on learning experience of using a tool with various disablities including Arthritis of the hands, visually impared, and other physical limitations.

 

The shaft of the screw driver extends and retracts back and forth to make the shaft a varitey of set lengths. It is also a ratcheting screw driver with a large toggle switch for ease of use and adjusting. The Indicators on the front of it to signify forwards and reverse are intentionally large, raised, and of a contrasting color so they can be easily identified. The palm grip is slightly oversized to accomidate Arthritis users that do not have the closest grip. There is also comfort grips added to give texture for gripping and some comfort in the hand hold. Lastly there is collar around the screw driver tip to help prevent screw wobble and hold the screw flush when driving in in addition to the magnetic tip.