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 ¼”, 5/16”, 3/8”, 7/16”, ½”, 9/16”, 5/8”, 11/16”, ¾” 13/16” and 7/8”.