Forged Made Of High Quality Chrome Vanadium Steel, Hardness Until Hrc55, Overall Heat Treatment, Hardness High Torque, Good Toughness, Toughness And Durability.Multi-Functional Design, Multiple Models, Buy One = Buy Eight, Various Maintenance, Fear Not No Tools. The Design Of The Keychain Can Be Hung Around The Waist, Which Is Compact And Convenient.The Surface Of The Keys Is Electroplated, Which Is Beautiful And Not Easy To Break. Rust. The Handle Adopts Blue Anodic Oxidation Treatment To Extend The Service Life Of The Product.Quality Exquisite Workmanship, Split Design, Each Can Be Opened Separately, You Can Adjust The Tightness. Of The Key Body.Simple/Double Bump Appearance + Middle Groove Design, Scientific Storage Groove, Simple And Exquisite Appearance, Thumb Can Be Placed; Reasonably In The Middle Groove During Use, And The Operation Is Convenient.