Asahi LSXS6 6 Piece Metric Open Ended Lightool Wrench Set Screw tightening work Over time Set contents (mm): 5.5 ~ 7 ? 8 ~ 10 ? 11 ~ 13 ? 12 ~ 14 ? 17 ~ 19 ? 22 ~ 24 Number of pairs (book): 6 mass (g): 505 JIS S grade Material: Chrome Vanadium Steel Surface Treatment: Nickel Chrome Plating Set contents (mm): 5.5 ~ 7 ? 8 ~ 10 ? 11 ~ 13 ? 12 ~ 14 ? 17 ~ 19 ? 22 ~ 24