Arm Ergometer, Upper Body Ergometer, UBE, or (my favorite) Arm Crank. Different names for the same piece of equipment. For a long time you would only find Arm Cranks in a rehabilitation setting. We used them a lot when I worked in a Cardiac Rehab unit. They were designed for people who didn't have the use of their legs, or those whose cardiopulmonary systems were compromised.

Now they are starting to pop-up more and more in the traditional health club setting. They are a great cardio workout, and nothing makes the muscles in my shoulders burn like this machine.

This is a commercial grade machine, but it is built to last.