ROBUST AND DURABLE: Metric Thread Flat Head Rivet Nuts are made of high quality stainless steel. They have superior rust resistance, which can guarantee a long service life. DEEP THREAD: These nuts rivet with a deep thread on the inside, which are effective in securing and non-slip. The knurled nut facilitates insertion into the workpiece. LARGE INSTALLATION TOOLS: Excellent rivet nut installation tools to make the job easier and faster. WIDELY USE: Crimp nuts can be easily installed in many types of materials, including secure fastening for metal, steel, plastic and fiberglass. SIZE AND QUANTITY: M5 crimp nuts in stainless steel 150 pieces, 10 mm * 12 mm. WIDELY USE: Mesh inserts can be easily installed in many types of materials, including a secure attachment for metal, steel, plastic and fiberglass.