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Fragola's Open End AN Wrenches are made of heat-treated aluminum, for the best compatibility with aluminum fittings and to prevent accidentally galling the finish of your hose ends. These wrenches work great for tightening AN hose ends in confined spaces and the custom short handles help to prevent over tightening. Another great feature of these wrenches is the inclusion of a 3/8" ratchet ID on the wrench that allows the use of a 3/8" Drive torque wrench for accurate torquing. Come pre-drilled for storage on a rack, thus freeing up space in your toolbox.Sold as a set of (5) wrenches. Includes -6, -8, -10, -12, and -16 AN sized wrenches.