So You Don't Have The Right Size Socket Handy? No Problem! You Can Use This Set To Reduce The Sizes From 3/8" To 1/4", From 1/2" To 3/8", And From 3/4" To 1/2". Just Snap On And Your Ready To Go.* 3 Pieces In Set * From 3/8" Female To 1/4" Male * From 1/2" Female To 3/8" Male * From 3/4" Female To 1/2" Male * Sturdy And Dependable