The Hex Key Set Is Made Out Of CRV(Chrome Vanadium). It Includes 3 different Hex Key Sets: Metric, Ball Point, and Torx.
The sizes for the key sets are: Metric:1.5/2/2.5/3/4/5/6/8mm Ball Point: 1.5/2/2.5/3/4/5/6/8mm Torx Key: T9/T10/T15/T20/T25/T27/T30/T40