In 1 set, common size combinations multiply the range and functionality of your outlet system, making your kit extremely versatile for a variety of repair needs. Package includes: This adapter package includes 3 pieces. Reducer and 3 pieces. Adapters: 3/8" drive (F) to 1/4" drive (M) reducer, 1/2" drive (F) to 3/8" drive (M) reducer, 1/4" drive (F) to 3/8-inch drive (M) adapter, and 3/8-inch drive (F) to 1/2-inch drive (M) adapter. Design Notes: The adapter's spring-detent ball locks securely into the socket, making the most of your socket with this handy adapter and reducer set, ensuring you always have the right size for the job. PREMIUM MATERIALS: These adapters and reducers are constructed from high-strength, heat-treated chromium vanadium steel with a corrosion-resistant nickel/chrome finish for use in industrial, mechanical or construction operations. allow.