Open End Wrench, Aluminum Bronze, Natural, Head Size 1 3/8 in, 1 7/16 in/ OVERALL LENGTH: 16.250 INCHES NOMINAL WRENCHING SURFACE SIZE: 1.375 INCHES NOMINAL FIRST END WRENCHING SURFACE SIZE: 1.438 INCHES NOMINAL SECOND END FEATURES PROVIDED: NONSPARKING AND NONMAGNETIC WRENCHING SURFACE SHAPE: OVAL BOTH ENDS INTERNAL SMALL END HEAD ANGLE: 15.0 DEGREES NOMINAL LARGE END HEAD ANGLE: 15.0 DEGREES NOMINAL MATERIAL: COPPER ALLOY OVERALL STYLE DESIGNATOR: 104 DOUBLE HEAD