Manufactured from chrome vanadium steel that's hardened and tempered. The ball end tip allows the hexagon key to be used up to 30° ; angle from the screwhead recess. Fitted in pocket-size plastic storage holder with non-slip grip. Display packed. Contents: 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0 and 8.0mm.