PurposeSocket for bulkhead fittings in 737 wing laydown positionsUsed WithTorque WrenchWhere Used737 wing bulkhead fittingWrench Size4-1/4Opening Shape6Wrench End TypeSocketWrench Body TypeStraightWrench VariationStandardDrive TypeInternal SquareDrive Size1/2Head Outer Diameter5.50Overall Length5.25