Product Characteristics: Tri-Fold Rivets provides a more robust riveting force, a greater supporting surface, and offers unique protection for delicate materials. Widely used in assembly of caravans, trailers, furniture, plastic-framed window body. The rivet assembly is inserted into a hole drilled through the parts to be joined and a specially designed tool is used to draw the mandrel into the rivet. This expands the blind end of the rivet and then the mandrel snaps off. Material Specification:Durable heat resistant Aluminum material. Not easily damaged, No rust, anti-oxidation. ensuring durability and long-lasting performance.Application: Product Name: Dome Head Tri-Fold Rivets Material: Aluminum Color: Silver Tone Grip Diameter: 4mm / 0.16" Grip Length: 20.8mm / 0.82" Flange Diameter: 8.4mm / 0.33" Easy To Install: Installation Steps for Tri-Fold Rivets 1.Tri-Fold Rivets are fasteners used to connect two materials together without the need for access to both sides. 2. The installation process involves placing the rivet into a pre-drilled hole 3. Then using a rivet gun to pull the mandrel, expanding the rivet and securing the materials in place. Package Contains:50(+/-2%) Pcs Dome Head Tri-Fold RivetsAttention:Please check size specifications and grip range before purchasing in order to avoid buying wrong size.