The package contains: There are 100 rivet nuts in total. The number of crimp nuts is enough for you to use it in many places without worrying about not having enough parts. Material: Stainless steel. Rivet nuts have excellent corrosion resistance and toughness, not easily deformed, and can be used for a long time. Size: Length 15mm. The size of the M6 rivet nut is widely used by many people and is suitable for most scenes, so you dont have to worry about choosing the size. Knurled bands: The rivet nut with knurling and thread makes it easy to insert the part, and it is firmly installed in the object, which makes it difficult to slip. Application: Rivet nuts are important integrated parts, suitable for automobiles, furniture, decorations, handicrafts and other electrical and industrial products.