PurposeDet -1 to torque nut retainer No. 161T1209 to 40-60 FT-LBWrench End TypeFace TeethWrench Body TypeStraightWrench VariationStandardDrive TypeInternal SquareInner Tooth to Tooth Distance1.750Number of Contact Points4Spanner ShapeSocketOverall Length1.63Inner Diameter1.75Fastener Number161T1209Drive Size1/2Tooth Protrusion0.190Tooth Width0.110Head Outer Diameter2.38 