Features: The & eacute; nuts & agrave; Rivets can be installed in many types of materials including steel, plastic and fiberglass. Galvanized Carbon Steel Rivet Nut Kit of high quality Size: M3 / M4 / M5 / M6 / M8 / M10 Quantity per package: 150 pieces Materials: carbon steel, galvanized Package contents: M3 x 9 mm - 40 pieces M4 x 11 mm - 40 pieces M5 x 13 mm - 30 pieces ; ces M6 x 15 mm - 20 pieces M8 x 18 mm - 15 pieces M10 x 21 mm - 5 pieces