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 1/8″, 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″ and 9/16″ Whitworth. 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 1/8″, 3/16″, 1/4″, 5/16″, 3/8″, 7/16″, 1/2″ and 9/16″ Whitworth.