Each socket adapter is made of heat-treated vanadium steel and black oxide coating with bracket torque compression to meet standard operating conditions 1/4″ hex shank for all quick change drill chucks with three 3-inch-long socket adapters and three 6-inch-long socket adapters in 1/4″ drives, 3/8″ drives, and 1/2″ drives. The perfect size makes it compatible with all brands of electric drill and screwdriver handle tools. An external weatherproof coating provides additional protection against damage. For example, components and materials that may come into contact with the extension rod during maintenance, such as oil and liquid, such as in the automotive field. These impact grade corrosion-resistant adapters are ideal for projects that increase torque and help prevent socket breakage and spalling.The spring ball bearings on each square head are securely locked in the socket to avoid slipping during use. Socket adapters are ideal for car repair, DIY and most general home repairs Set Includes: 1/2″ x 6 Inch; 3/8″ x 6 Inch; 1/4″ x 6 Inch 1/2″ x 3 Inch; 3/8″ x 3 Inch; 1/4″ x 3 Inch On Jul 8, 2022 at 23:10:49 PDT, seller added the following information: