Suitable for professional, students, and archivists requiring securelybinding and fastening for frequently accessed files and organizational project Features easy installation through its innovative inner locking male female designs and rustproof break resistant alloy construction for long time durability Crafted with kids safe metal, these rivets nut assortment supplies used across educational, professional, and household applications Perfectly handle thick booklets in corporate setting, school assignments, or home craft while maintaining neat document presentation Secure your documents with these metal screw rivets, used for binding of ledgers, folders, and multiple page without loosening