1. Heat treated chrome vanadium alloy steel drop forged provides long life durability.2. The surface is polished and electroplated with nickel and chromium treatment, high hardness and wear resistance, oil and water resistance, not easy to rust.3. The 12-Point box end provides strong gripping to tighten or loosen bolts without round-off, it won't slip even under high torque.4. 72-tooth mechanism allows you to work in the narrow space with a 5-degree ratchet movement.5. The opening angle is 15 degrees, so the wrench can be flipped over with each rotation to engage the fastener twice as often in tight spaces.6. Short length is easy to operate in areas with limited space7. Used to fasten or remove hexagon head bolts or nuts; widely used in industries as repairing and maintaining, machinery, electric power, household, industrial and mining.Specification:Double End Size: 9mmTotal Length: 90mm / 3.54 inchHardness: HRC 43-48Material: Chrome Vanadium Steel (CR-V)Finish: Chrome Plated, Mirror PolishedColor: Silver Tone, BlackPackage Content:1 x Ratcheting Combination Wrench