High quality, industrial grade, professional set. Made with Eklind Alloy Steel. Heat treated for optimum strength and ductility. Finished with Eklind Black Finish to resist rust. Fold up sets include a variety of popular sizes in one convenient handle to keep you from losing individual keys Sizes include: .050", 1/16", 5/64" 3/32", 7/64", 1/8", 9/64", 5/32" and 3/16". Fold a key out to a right angle to get maximum leverage. Fold a key out completely to operate like a screwdriver. Eklind Classic steel fold-up sets are compact to fit most easily in your pocket. Made in the U.S.A.