Chrome vanadium. Double ended T-type metric hex keys with metal storage stand. Sizes: 2, 2.5, 3, 4, 4.5, 5, 5.5, 6, 8 and 10mm. Chrome vanadium. Double ended T-type metric hex keys with metal storage stand. Sizes: 2, 2.5, 3, 4, 4.5, 5, 5.5, 6, 8 and 10mm.