PurposeTo prevent fuse pin (310U2301 from rotating upon installationWrench End TypeFace TeethWrench Body TypeStraightWrench VariationStandardDrive TypeInternal SquareInner Tooth to Tooth Distance2.250Number of Contact Points4Spanner ShapeSocketOverall Length1.35Fastener Number310U2301Used WithTorque wrenchDrive Size1/2Tooth Protrusion0.280Tooth Width0.150Head Outer Diameter2.50