Wera 8784 A1 05003529001 Bit adapter Drive (screwdriver) 1/4 (6.3 mm) Downforce 1/4 (6.3 mm) 37 mm 1 pc(s)

Connection part from square to hexagonal. For 1/4" hex bits to DIN 3126-C 6.3 and E 6.3, ISO 1173 and Wera connection items 1 and 4. With quick change fodder.

Price: 19.99 from Conrad Electronic