CR-MO (chromium molybdenum) alloy steel for long life.Fully guaranteed.Heavy duty blow molded storage case.Includes 1-5/16" to 2-1/4"Sunex 2690 16 Piece 1/2" Drive Fractional SAE Impact Socket Set
From the Manufacturer
This Sunex 1/2-Inch drive 16-Piece impact socket set will give you years of usage. It comes with a lifetime warranty which backs the craftsmanship of this CR-MO alloy steel product. It will meet your needs and is at a great value.