ORIGINAL: JollyPopper
I love ball drivers. And the best I have seen are from RTL Fasteners. They have a detent on the ball that keeps the screw on the driver no matter what angle. These are much like the detents used in ratchets that keep the sockets or extensions on the ratchet at any angle. You can put the screw/bolt on the driver and then start it at any angle, vertical, horizontal, whatever, and the screw stays on the driver. You have to actually pull it out of the screw after the screw is tightened.
I haven't seen those before, very cool!!! I have several sets that I have bought from different places over the years. The ones I use the most are long shanks with a yellow handle but no name on them, very good steel and they have been with me for too many years to even remember where I got them. I have several I have bought at Sears too but I bought them as needed and haven't got a full set. I have bought some on sale at Harbor Freight and they were a waste of money. I think the shanks were made of butter.