Cobra™ Fitting Adjustable Wrench Tool, AluminumAny time you're installing aluminum hose fittings and using a steel tool, you run the risk of boogering up your fitting, as steel is naturally much harder than aluminum. You can minimize this by wrapping your steel tool (or fitting) in electrical tape before you cinch it down, or you can use an aluminum tool. This adjustable wrench fits Cobra fittings and AN sizes up to #12 and fits very comfortably in your hand. You'll feel the difference when you