8PCS Impact Socket Adaptor Set 1/4" 3/8" 1/2" 3/4" Step Up/Down Reducer F to M

IMPACT SOCKET ADAPTOR SET 1/4" 3/8" 1/2" 3/4" Drive step up/down reducer. 1 x 1/2" F x 3/4". 3/8" F x 1/2" M - 2 pieces.

eBay