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 not 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 Specifications: Materials: carbon steel< /p> Surface Finish: Zinc Plating Type: Rivet Nut Color: as the picture Thread Size and Quantity(optional): M3×100pcs M4×100pcs M5×100pcs M6× 100pcs M8×20pcs M10×20pcs M12 × 20pcs NOTE: 1. Products contain small parts, never let children play to avoid inadvertent