Features: Brand new and high quality Forging with steel is good toughness and wear resistant. High-frequency hardened and Black oxidized treatmentS with high hardness and corrosion-resistant. Red rubber cover handle offer comfortable hand feeling, ergonomically design and ensures force transmission. O type spanner is designed to drive spanner head screws, threaded rings and shafts. Exact fits reduces the risk of shafts, nut and housing damage. Greatly improve the accuracy, save time and convenient for operation. Suitable for ER25 lathe clamping nut, milling lathe chuck nut, and most tool holders. Specifications: Material:Steel Length:Approx.242mm/9.52inches Package Includes: 1x O-Type Wrench note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.