GreatNeck HK34 Metric, SAE and Star Hex Key Set, 34-Piece Made of carbon steel for strength and durability SAE: 3/8-Inch, 5/16-Inch, 7/32-Inch, 3/16-Inch, 5/32-Inch, 9/64-Inch, 1/8-Inch, 7/64-Inch, 3/32-Inch, 5/64-Inch, 1/16-Inch and 3/64-Inch Metric: 1.27, 1.5, 2, 2.5, 3, 4, 5, 5.5, 6, 8, 10 mm Star: T10, T15, T20, T25, T27, T30, T40, T45, T50, T55, T60 Covered by GreatNeck limited lifetime warranty