Scope of application: Apply to hotfix bathtub, mount storage containers on tail door and anchor on wheel wells; Use rivet nut installation tools to make the job easier. Easy to install: Knurled nut design makes these rivet nuts easy to insert into the work piece and many kinds of materials, such as metal plate, plastic, fiberglass and so on. M6 flat head rivet nuts: The rivet nut model is M6, which features round internal thread and coarse etching outside for tightly inserted and fixed parts, provides superior frictional and biting force. Package/Quantity: Type: M6; Package Quantity: 100pcs.Material: Aluminum Very practical: large rivet nut installation tools for easier and faster work. Quantity: 100 pieces