PurposeTo install and torque "Elastic stop nut corp No. BR9247-1718" or "Shur-Loc Corp. No SL 2778-2" or similar nuts. Also used for BACN10RF nut.Wrench End TypeFace TeethWrench Body TypeStraightWrench VariationStandardDrive TypeInternal SquareInner Tooth to Tooth Distance1.241Number of Contact Points4Spanner ShapeSocketOverall Length1.75Inner Diameter1.24Fastener NumberBR9247-1718Used WithTorque wrenchDrive Size1/2Tooth Protrusion0.375Tooth Width0.162Head Outer Diameter1.50 