Function: 1. Zinc Alloy: Made of superior zinc alloy, these nuts are strong, wear-resistant, not easy to rust and oxidize. 2. Easy installation: drill the right size hole at the place of use and install with a hex wrench or other optional drive tool. Very comfortable! 3. 5 kinds of nuts: There are five kinds of screws in the package, and a total of 200 pieces, trying our best to meet the installation requirements. 4. Easy to carry: all parts are sorted and packed in a plastic case, convenient to take with you to help with your work. 5. Perfect replacement: These threaded insert nuts are simple to install and are a great replacement for worn parts. Specification: Item Type: Threaded Inserts Nuts Specifications: M4 M5 M6 M8 M10 Product material: zinc alloy Package List: 30 M4x10 threaded nuts 30 M5x10 threaded nuts 20 threaded nuts M6x10 20 threaded nuts M6x15 20 threaded nuts M6x18 20 threaded nuts M6x20 20 threaded nuts M8x15 20 threaded nuts M8x20 20 threaded nuts M10x25 1 x storage box