Features and Benefits:17 Piece Impact Adapter Set;Universal Joint: 1/4 in., 3/8 in., 1/2 in.;Wobble Extension Bars: 1/4 in. Dr. -2 in, 4 in, 6 in, 3/8 in. Dr. -3 in, 6 in, 10 in, 1/2 in. Dr. - 3 in, 5 in, 10 in;Adapters: 1/4 in. F x 3/8 in. M, 3/8 in. F x 1/4 in. M, 3/8 in. F x 1/2 in. M, 1/2 in. F x 3/8 in. M, 1/2 in. F x 3/4 in. M";Material: Chrome-molybdenum Black Phosphate;17 Piece Impact Adapter Set. One kit with all the popular extensions, universal joints and drive adapters. Made from Chrome-molybdenum Black Phosphate. Includes a convenient storage tray. Color retail packaging.