Multi Size Set: Comes with a comprehensive set of sizes 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, and 30mm to meet diverse fastening needs with ease Plastic Storage Box Included: Designed for convenience, this feather key set comes with an organized plastic box for easy storage, portability The performance: Built with robust material and fine processing, these keys offer good performance even under frequent use for equipment disassembly and reassembly Equipment Maintenance: Specifically designed for applications requiring frequent equipment disassembly, these parallel feather keys provide secure fastening About Craftsmanship: Each round ended feather key is accurately processed to have a smooth surface that enhances usability and safety