The DEWALT DWMT86414B 1/2" Drive Adapter is designed to work with a 3/8" drive ratchet or breaker bar. It can be used in place of a socket and has an output drive size of 3/8". This adapter works with SAE measurements. The durable, high performance adapter has a 1/2" drive size. The DEWALT DWMT86414B 1/2" Drive Adapter will help you get the job done right every time. | DEWALT 1/2" x 3/8" Reducing Socket Adapter DWMT86414OSP