Material: Made of 304 stainless steel, strong and corrosion resistant Head type: Flat head; Colour: Silver Tone Rivet Range: 0.5 - 5mm Package: 180 Rivet Nuts including 6 sizes of M3, M4, M5, M6, M8, M10 for meet your different needs Application: Perfect for automotive, furniture, decoration and other electrical and industrial products