Crescent AT24VS 4" Black Oxide Finish Adjustable Wrench Alloy steel and heat treated, Black Oxide finish resists corrosion, Polished head and regular, non-slip grip handle Laser Etched Scale Provides a Quick and Convenient Way to Determine Fastener Size in Either SAE or Metric Wide Capacity Jaw Allows Each Tool to Work with More Fastener Sizes Wider Handle Provides More Comfort and Less Stress to the Hand Tension Spring Stabilizes Jaw and Knurl Adjusts Easily