Open and bi-hexagonal ends with 15° offset for greater access. Hardened and tempered, drop-forged chrome vanadium. High quality fully polished finish. Plastic storage tray. Includes sizes 8, 9, 10, 11, 13, 14, 17 and 19mm. Open and bi-hexagonal ends with 15° offset for greater access. Hardened and tempered, drop-forged chrome vanadium. High quality fully polished finish. Plastic storage tray. Includes sizes 8, 9, 10, 11, 13, 14, 17 and 19mm.