Usage Tips:Features: 1. It is a rivet set, can meet different using needs. 2. Made of aluminium material, which has good corrosion-resistant and long service life. 3. The fastening effect is perfect and it is not easy to fall off. 4. Rivets are designed with flat head, which makes installation easier. 5. Rivet is solid structure with higher mechanical strength. Specification: Condition: 100 percent Brand Item Type: Solid Rivet Material: Aluminum Diameter x Length (mm) (No Caps Included): M4x20, M4x25 (optional) Quantity: 100pcs Package List: 100 x Solid Rivet Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.1It is a rivet set, can meet different using needs. 2Made of aluminium material, which has good corrosion-resistant and long service life. 3The fastening effect is perfect and it is not easy to fall off. 4Rivets are designed with flat head, which makes installation easier. 5Rivet is solid structure with higher mechanical strength.