PurposeSocket for installing the 16P138-9 surge valveUsed WithTorque WrenchWhere Used16P138-9 surge valveWrench Size1-3/4Opening Shape6Wrench End TypeSocketWrench Body TypeStraightWrench VariationStandardDrive TypeInternal SquareDrive Size1/2Head Outer Diameter2.50Overall Length3.25