6 in 1 feature, common size combinations multiply the range and capacity of your jack system, making your set very versatile with multiple repair needs. Set includes : This adapter set includes 3 pieces. Reducers and 3 pieces. Adapters: 3/8" Reducer (F) to 1/4" Drive (M), 1/2" Drive (F) Reducer to 3/8" Drive (M), 1/4" Drive (F) to 3 Adapter /8" Drive (M), 3/8" Drive (F) to 1/2" Drive (M) adapter. Design Guidelines: The spring-loaded distraction balls on the adapters lock the sockets in place Safely, get the most out of your sockets with this handy set of adapters and reducers that ensure you'll always have the right size for the job. Quality Materials: These adapters and reducers are manufactured made from high strength chrome vanadium steel, heat treated and have a corrosion resistant nickel/chrome finish for industrial, mechanical or construction work. Included: 3 reducers and 3 adapters Drive reducer 3/8" (F) to 1/4" (M) Drive reducer 1/2" (F) to 3/8" (M) 3/4" (F) drive reducer to 1/2" drive (M) 1/4" (F) to adapter 3/8" Drive (M) Adapter 3/8" (F) to 1/2" Drive (M) Adapter 1/2" (F) to 3/ 4" Drive (M) Color: silver Quantity delivered: Set of 6