781 a/b 1/4" to 3/8" square adaptor

Connection part 1/4" square head socket to 3/8" or 1/2" 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. * 1/4" to 3/8" connection part * With 1/4" square head socket drive * Secure socket fixing * Made of chrome-vanadium for high load capacity