[Quality Material] Made of 304 stainless steel, one of the most corrosion resistant metals. It is also non-toxic, resists oxidation well, has a long service life, and is not easily deformed under high pressure. 【High Precision Thread】These rivet nuts have deep knurling net inside, good friction and bite force, effective fixing and anti-slip. 【Fixing performance】The rivet nuts have good fixing performance and can be inserted to fix the parts and fixed firmly. [Ease of use] These round inserts with threads can be inserted firmly into objects, simply by drilling a hole of the right size and installing them with a hex wrench. Besides, it is lightweight and very easy to carry. [Wide Range of Applications] A great alternative to industrial and construction fasteners and an important accessory in your daily life. Suitable for cars, furniture, decorations, crafts and other electrical and industrial products.