1/4"6PT DEEP IMPACT SKT 3/8 DRProduct Features: Recessed Corners distributes torque across flats - promoting life. Thinner Than Wrench Sockets for tough to access areas. Large Laser Etched Markings - Easily Identifiable. Provides the Impact Driver user with a socket solution. Designed for use in both corded & cordless Impact drivers and wrenches.