This is a precision hex ball driver, size 3/32 in, to fit socket-head fasteners.
It is Wiha model 264.

Details:
•    Tip size:  3/32 in
•    Shank length:  2-3/8 in
•    Overall length:  6-1/2 in
•    Handle length:  4-1/4 in
•    Handle material   Plastic
•    Handle design:  Ergonomic with rotating cap

New condition.

If you need a hex ball driver of this size from a quality manufacturer, this could be a good deal for you.