Earl's Aluminum Adjustable AN Wrench - fits -3 to -12 AN SizesTired of having to run to your toolbox multiple times to get the proper AN wrench? Earl's has engineered a solution! The new Earl's AN adjustable wrench is CNC machined from true aerospace grade 7075 billet aluminum and features a precision mechanism with a Steel Nickel knurled thumbwheel. The handle has chamfered edges that fit comfortably in your hand. Quick size adjustment make it ideal for use in the pit area, staging lanes, or back at the shop.