Adjustable Pin Spanner Wrench, Side, Alloy Steel, Black Oxide, Pin Diameter 1/8 in/ OVERALL LENGTH: 6.375 INCHES NOMINAL PIN DIAMETER: 0.125 INCHES NOMINAL OPENING DIAMETER: 0.750 INCHES MINIMUM AND 2.000 INCHES MAXIMUM MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 633 ADJUSTABLE PIN SPECIFICATION/STANDARD DATA: 0U583-SAE AS6018 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 2 CLASS