Whether you are a professional mechanic or an amateur, the Proto J7328M 28mm Impact Socket is the tool for you. The alloy steel socket has a black oxide finish and 6 points. With a size of 28mm, it is designed to fit impact wrenches and tools with 1/2″ drive sizes. It also has an overall length of 3 1/2 in., which means it can reach tight spaces easily. The Proto J7328M 1/2″ Drive Impact Socket will help you get any job done right.