AN Open End Wrench, Fits -6N (3/4 in. Hex) HD & -6 AN (11/16 in. Hex) Standard Fittings, Laser-Etched Aluminum, Black Hard Anodized Finish, Sold Individually|JEGS AN Open End Wrench Fits -6 AN (3/4 in. Hex) HD to -6 AN (11/16 in. Hex) Standard Fittings.