Gedore RED 3300521 Bit Adapter 1/2in Drive with 5/16in Hex l.38mm

Matt chrome-plated
For hand-operated sockets
Square drive as per DIN 3120 - C 12.5, ISO 1174, with ball retention groove
Hex recess drive as per DIN 3126 - D 8 (5/16"), for bits
Clamping ring
Chrome-vanadium steel