The anti-loosening function can resist long-term continuous vibration without loosening the screw.  These screws are reusable, and will not affect the fixed anti-loosening function. It is low and high temperature resistant, which can be stored at minus 40 degrees to 150 degrees, and its performance is stable.   Item Name: Brake Disc Screws Quantity: 12Pcs Material: Steel Features: Durable, Solid, Bike Parts Size: Total Height: 1.4cm/0.55", Nail Depth: 1.15cm/0.45", Nail Width: 0.46cm/0.18" (Approx.)   Notes: Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.   Package Includes: 12 x Brake Disc Screws