Double open-ended with 15° offset for greater access. Hardened and tempered, drop-forged chrome vanadium. High quality Fully polished finish. Ultra-strong ballistic nylon storage roll. Sizes: 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, and 16 x 17mm. Double open-ended with 15° offset for greater access. Hardened and tempered, drop-forged chrome vanadium. High quality Fully polished finish. Ultra-strong ballistic nylon storage roll. Sizes: 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, and 16 x 17mm.