Power adapter with lock button for 3/8" internal drive x 1/2" external drive

Specifications: Dimension B, Outside Squares, Dr., inches: 1/2"; Country of Origin: USA; Socket Attachment: Pin Type; Dimension A, Inside Squares, Dr., inches: 3/8"; Retention Type: Pin Type; Dimension C, Outside Diameter, inches: 3/4"; Finish: Industrial Finish; Dimension D, Length, inches: 1-5/16"; Warranty: Lifetime warranty, non-repairable, guaranteed for materials and workmanship/while the purchaser owns the tools; Warnings: For complete warning information see CAT1600 pages W1-W4