High Quality - Nuts are made of high quality zinc plated carbon steel. Zinc plated carbon steel is widely used material in hardware, for long service life Safety - Our nuts adopt high quality material, environmental protection and non-toxic. In the process of using, there are no toxic substances to be released. Precise Threading - The nut threading is very precise and clean. It can make your job easier. Our nuts conform to the standardized metric system Wide application - The nuts are ideal for professionals and DIY enthusiasts. The kit is perfect for replacing lost and lost ones. 7 popular sizes for your choice: M3×100pcs, M4×100pcs, M5×100pcs, M6×100pcs, M8×20pcs, M10×20pcs, M12×20pcs