Armstrong Tools 9/16 x 5/8 Box End Wrench 12-point. USA 26-679
Removes even worn fasteners''Lobular'' design exerts force on flats of fastenersHeat-treated to ensure correct hardness and springPrevents rounding of fasteners' cornersNo. of Points: 12Opening Type: Box/BoxAeronca x 6 1428 s1143b2