For connecting screwdriver bits to drive attachments or screwdrivers with a 1/4, 3/8 or 1/2 inch square drive.
With locking system, prevents accidentally releasing or losing the bits.
Bit socket: D 6.3
Square drive: 1/4 in
overall length: 23 mm
Hexagon drive: C 6.3 (1/4 inch)