PurposeTo adapt wrench for use in limited access in the wing spar areas or similar useWrench VariationStandardWrench Size3/8Opening Shape12Wrench End TypeBox EndWrench Body TypeStraightDrive TypeDouble Internal SquareDrive Size1/4Center-to-Center Distance1.63Head Thickness0.13Used WithTorque WrenchWhere UsedWing spar