1、Made of aluminum alloy material with high hardness oxidation resistance corrosion resistance 2、Suitable for construction automobiles ships airplanes machinery electrical equipment furniture etc. 3、Especially suitable for riveting occasion where the use of ordinary rivets is inconvenient 4、320Pcs of rivets set contain 80 sets of 4 types which will meet your different using needs well 5、These dome head blind rivets are kept in a transparent storage box easy to access and carry