Connection part 1/2" 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.

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