This Faithfull Long Arm Hex Key Set contains a selection of 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. Ball end keys allow angle entry to 25. Works in hard to reach areas. Faster insertion and removal. Supplied in an ergonomic double layer, open out storage caddy which allows easy access to the smaller keys. Each key has a dedicated and clearly marked space for easy identification and is safely stored and ready for use. Metric Sizes 1.3, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 8, 10mm