PurposeTo tighten spanner nut as requiredWrench End TypeFace TeethWrench Body TypeStraightWrench VariationStandardDrive TypeInternal SquareInner Tooth to Tooth Distance1.150Number of Contact Points4Spanner ShapeSocketOverall Length3.55Inner Diameter1.15Used WithTorque WrenchDrive Size1/4Tooth Protrusion0.080Tooth Width0.150Head Outer Diameter1.38