- M4 x 12mm aluminum semi-tubular rivets, perfect for durable fastenings in DIY and hardware projects. - Flat head design provides a clean and secure finish on the work surface. - The pack includes 100 units, ideal for batch work or large-scale projects. - Its tubular hole reduces the force required for application, making assembly easier compared to solid rivets. - They allow joining various materials such as leather, plastic, rubber, or fabric, even without pre-drilling. - They function as pivot points in moving structures, thanks to the localized swelling at the tail of the rivet. - Can be used with a rivet cap to improve the aesthetics of the final result. - Dimensions: shank diameter 4mm, length 12mm, head diameter 7mm, total length 13mm. - Efficient and professional solution for permanent fastenings in multiple applications.