781 A 1/4" Connection parts, 781 A/B x 3/8 x 25.2mm x 1/4"

Connection part 1/4" square head socket to 3/8" external square head. For manual and machine-operated tools (non-impact), with ball stop groove to safely lock the socket, knurling at the rear end for manageability during manual use; chrome-vanadium, dull chromed.