Impact Socket Set, Standard Length, Drive Size 1/2 In, SAE, Number of Pieces 11, Socket Type 6 Pt Std, Sockets Included 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/16, 1-1/8 In, Accessories Blow Molded Case Impact Socket SetsDesigned to withstand the high impacting torque loads that modern impact wrenches produce. Impact sockets are heat treated to a lower hardness than hand or power sockets to ensure durability for impact applications.Always use retaining rings and pins for impact sockets with 3/4" drive and larger