Leadrise&reg; 4pc Adapter and Reducer Air Impact Set 1/4" to 3/8" 1/2 Inch Made from high-strength, heat-treated chrome vanadium steel Corrosion-resistant chrome plated finish Locks onto socket and drive tang 2-Piece. Adapters: 3/8-Inch (F) x 1/2-Inch (M), 1/4-Inch (F) x 3/8-Inch (M) 2-pc. Reducers: 1/2-Inch (F) x 3/8-Inch (M), 3/8-Inch (F) x 1/4-Inch (M)