Connection part 3/8 square head socket to 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. 3/8 to 1/2 connection part With secure socket fixing With 3/8 square head socket drive 1/2 external square Made of chrome-vanadium for high load capacity Brand Name Wera Unit Count 1.0 Count Item Length 36 Millimeters Drive System Square Finish Types Brushed Manufacturer Wera Model Number 781 B Material Type Chrome Vanadium Steel Item Type Name 781 B 3/8 CONNECTION PARTS, 781 B/C X 1/2 X 36 MM X 3/8 Number of Pieces 1 Bit Compatibilities 3/8 , 1/2 Included Components 781 B 3/8 CONNECTION PARTS, 781 B/C X 1/2 X 36 MM X 3/8 Drive Bit Shank Style Square Manufacturer Part Number 05042673001 Global Trade Identification Number 04013288221056