A one arm wheelchair is a specialty type of wheelchair that allows the user to propel themselves in a manual chair by using a mechanism that allows them to use just one arm. By pushing on one wheel it will also propel the other side to move as well. The way they do this is by connecting both the left and right wheels together so that it will propel at both sides all together. WE do not offer this type of device. However, your doctor should be able to not only prescribe, but also obtain a unit for you if you have a medical necessity.