Adjustable Pin Spanner Wrench, Side, Alloy Steel, Black Oxide, Pin Diameter 1/4 in/ OVERALL LENGTH: 8.125 INCHES NOMINAL PIN DIAMETER: 0.250 INCHES NOMINAL OPENING DIAMETER: 1.250 INCHES MINIMUM AND 3.000 INCHES MAXIMUM MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL STYLE DESIGNATOR: 633 ADJUSTABLE PIN SPECIFICATION/STANDARD DATA: 0U583-ASM3 AS4283 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 2 CLASS