Features and Benefits: * 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 * Includes plastic holder which firmly retains each key in a size marked hole Sizes include: 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm and 10.0mm. Color coded blue for metric. Made in the U.S.A.