When I tried this tool on my latest industrial project, I was amazed at how efficient it was .The ball hex design made it easy to maneuver and get to hard-to-reach places. The handle was comfortable to grip and did not cause any hand fatigue, even after extended use. The precision of the screwdriver was impressive, and it saved me a LOT of time. The only con i experienced was that the size was a bit bigger than I expected, making it difficult to store in my toolbox. Overall this is a reliable tool for any industrial and scientific project..