870/7 Adaptor Tool shank for power tool sockets square head output. 7/16 hexagonal, suitable for power screwdrivers with take-up as per DIN ISO 1173-F 11.2. Adaptor for machine-operated nut spinner sockets
1/2" external square
7/16" hexagon drive (Wera series 7) 870/7 Adaptor, 1/2" x 75 mm