Deep offset ring ends for access to recessed fasteners hardened tempered drop forged chrome vanadium high quality fully polished finish ultra strong ballistic nylon storage roll includes sizes 6 x 7 8 x 9 10 x 11 12 x 13 14 x 15 16 x 17 18 x 19 20 x 22 21 x 23 24 x 27 25 x 28 30 x 32mm