The 5pc. Adapter and Universal Impact Socket Set is engineered to dramatically outlast the competition. It comes with a heavy duty blow molder storage case. This kit includes two Universal Joints 3/8″(3301), 1/2″(2300), and 3/8″ Female to 1/2″ Male Adapter(3300), 1/2″ Female to 3/8″ Male Reducer(2301), 1/2″ Female to 3/4″ Male Adapter(2302).