Proxxon Rotary Ratchet 3/8" Drive
You know the situation, you can get your socket on the nut but there’s hardly any room to move the handle. That’s not a problem any more- just twist the handle to drive the socket until the nut is home then give it a little tweek to harden up. Magic! If there’s no room even for the tweek then use the drive socket on the end of the handle to apply torque.
Perfect for working on that difficult to access engine.
*Tommy bar and sockets not included