The CHANNELLOCK® 34211 1/4 inch Drive Standard SAE Socket Set comes equipped with 21 pieces, including 9 standard sockets, 7 deep well sockets, 3 and 6 inch extensions, Universal Joint, Spinner Driver Handle, and a Quick Release 45 Gear Teeth Ratchet. These 6pt deep and standard sockets feature DYNA DRIVE® technology which offers 20% more torque, eliminates slippage and prevents damage to fasteners. Includes a parts list diagram and molded inlay all contained within a steel case for easy and secure storage.