1[Rust Proof And Durable] Bike crank screws are made of premium titanium alloy, with exquisite workmanship, rust proof, anti oxidation and durability. 2[Stable And Reliable] With excellent manufacturing process, the surface of the crank screw is finely polished to ensure strength and improve reliability. 3[Compact And Lightweight] Rustproof bike crank screws are lightweight, small size, easy to carry, DIY replacement parts for bikes, with long service life. 4[Firm Connection] These bike crankset arm screws are accuracy and standard threads to ensure a secure fit and a firm connection, not easy to fall off. 5[Easy To Install] Bike crank covers are designed with small size, easy for you to install and remove, saving time and effort. Suitable for most road bikes.