Features: Material: Made of premium metal with heat treatments, it is sturdy in use and corrosion resistant Package: Comes with 4 wheel-bolts and 1 key, so it is practical and convenient Easy to Install: Easy installation, straight bolted into the wheel and locked with key Stable properties and high reliability: As threaded fasteners, the locking wheel nut wrench has stable properties and high reliability. These wheel-bolts provide excellent protection against theft. It is a premium replacement for the old or broken product, which is economical and practical to use. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Material: Metal Internal Diameter: 17mm / 0.6739;39;Package List: 1 Set Anti-Theft Wheel-Bolts