Craftsman Flare Nut Wrench Set SAE Polished, 5-pc 9-42012 5-piece set includes the following sizes: 1/4 x 5/16, 3/8 x 7/16, 1/2 x 9/16, 5/8 x 11/16, and 3/4 x 7/8 Traditional flat design made of alloy steel and fully polished Works on aluminum, copper and brass hexagonal fittings Molded storage case included Backed by the Craftsman Lifetime Guarantee