Features: Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments. Great for use in confined areas where the head needs to be flush or below the surface. Well packed and assorted in a transparent plastic box for convenient use and storage. There are several common lengths in this set for general purpose use which will meet daily basic needs. Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. Specification: Material: 304 stainless steel Size & Quantity: M3*5 20PCS M3*6 20PCS M3*8 20PCS M3*10 20PCS M3*12 20PCS M3*14 20PCS M3*16 20PCS M3*20 20PCS M3 Nuts 180PCS Package list: 1 box * Fasteners Package List 1Made of 304 stainless steel material, the 304 stainless steel material provides strength and offers good corrosion resistance in many environments. 2Great for use in confined areas where the head needs to be flush or below the surface. 3Well packed and assorted in a transparent plastic box for convenient use and storage. 4There are several common lengths in this set for general purpose use which will meet daily basic needs. 5Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry.