Flare Nut Wrench, Alloy Steel, Satin, Head Size 3/8 in, 7/16 in, 6-Point Flare Nut, 6 1/4 in/ OVERALL LENGTH: 6.250 INCHES NOMINAL WRENCHING SURFACE SIZE: 0.375 INCHES NOMINAL FIRST END WRENCHING SURFACE SIZE: 0.438 INCHES NOMINAL SECOND END WRENCHING SURFACE SHAPE: 6 POINT BOTH ENDS INTERNAL MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMIUM OVERALL STYLE DESIGNATOR: 130 FLARE NUT DOUBLE END