Impact Socket Adapter and Reducer Set, Use with Impact Wrenches and Drills in Auto and Impact Driver Construction Work, 8 Piece - (3/8in. to 1/4) (1/ 2in. to 3/8) (3/8in. to 1/2) (1/4in. to 3/8) … - Amazon.com
RS PRO 1/2 in, 1/4 in, 3/8 in Square Adapter | RS
Amazon.com: OEMTOOLS 22535 Low Profile Adapter Set, 3 Piece Set, Converts Ratchet Sizes, 1/2", 1/4", and 3/8" Drive Socket Adapter Set, Designed to Fit Tight Spaces : Tools & Home Improvement