Adjustable Aluminum Lightweight Wrench Fitting Tools (Red) AN3 AN4 AN6 AN8 AN10 AN12 Adjustable Aluminum Wrench Fitting Tools. Wrench Weight: 5.80 ounce. Size: AN3 AN4 AN6 AN8 AN10 AN12 Universal (AN3-AN12). Made of Lightweight 6061 Alloy Aluminum. Dimensions: 7 L x 2.5 W x 0.5 H inch.