This 7 piece, 1/2 inch drive set features: ten times more fastener contact, greater strength, torque and gripping power than other sets. Includes: 7/16"(4814), 1/2"(4816), 9/16"(4818), 5/8"(4820), 11/16"(4822), 3/4"(4824), 13/16"(4826) packaged on a rail with clips