high strength, corrosion resistant, stainless steel for harsh environmentsPlease check the size before buying, this belongs to M10 nut, mountain bike bicycle fixing equipment DIY remodeling accessoriesThis is used to distribute the pressure of the nut onto the part to be fastened, thereby reducing the risk of damaging the part and making loosening due to the uneven mounting surface less likely.Easy to install, suitable for fast bicycle screws, flange nut has a wide flange at one end, can be used as a whole non-rotatingDelivery Quantity: 10pcs,Size: M10, pitch 1mm, suitable for 15mm socket wrenchColor: silver1. Package content: only the above package content, excluding other products.2. Tips: The size is measured manually, please allow 1-2 cm measurement error3. Due to different displays and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.