Bit adapter with quick-change coupling for power screwdrivers 1/4"

For connecting screwdriver bits to drive attachments or screwdrivers with a 1/4, 3/8 or 1/2 inch square drive.
With quick-change coupling; for electric screwdrivers.
Square drive: 1/4 inch
overall length: 30 mm
Hexagon drive: C 6.3 (1/4 inch)