Open and bi-hexagonal ends with 15° offset for greater access. Hardened and tempered, drop-forged chrome vanadium. High quality fully polished finish. Ultra-strong ballistic nylon storage roll. Includes sizes 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 19 and 22mm. Open and bi-hexagonal ends with 15° offset for greater access. Hardened and tempered, drop-forged chrome vanadium. High quality fully polished finish. Ultra-strong ballistic nylon storage roll. Includes sizes 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 19 and 22mm.