Features The WESTWARD® impact socket set is designed 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. Finish / Phosphate Drive Size / 3/4 inch Impact Rated / Yes Drive Type / Square Number of Pieces / 8 Standards / ASME B107.2 Includes / Metal Box