Wera Zyklop 8784 3/8 in Square Adapter, 44 mm Overall

Adaptor from square to hex. For 1/4" hex bits as per DIN ISO 1173-C 6.3 and E 6.3 and Wera connecting series 1 and 4

3/8" Zyklop adaptor with quick-release chuck for rapid bit change
Suitable for 1/4" hex bits (Wera connecting series 1 and 4)
Chrome vanadium steel

8784 B1 Zyklop bit adaptor, 3/8", 1/4" x 3/8" x 44 mm