Professional quality keys made from fully hardened Chrome-Vanadium steel. All keys from 4mm have chamfered edges to prevent damage to blade and fittings. Long arm design allows access to deep set screws or difficult to reach places The clip case storage container ensures that the key set can be safely stored in clothing pockets and toolboxes. The key sizes are clearly shown on the clip. 9 piece (Long Arm) [hx] 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10mm. Description: Hex Key Set (9) Metric - Long Arm