Stanley Proto J7651 Proto 1/2-Inch F x 3/8-Inch M Impact Drive Adapter
Stanley J7651 Proto Impact Drive Adapter 1/2-inch F x 3/8-inch M Use adapters to help increase or decrease drive end size. Do not use hand adapters with power tools. Do not over torque small sockets when using them with adapters on large drive tools. Size stamped on tool for easy identification. Side locking hole.