Toolcraft Snap Rings, size 21 mm × 85 mm, made from spring steel according to DIN 7346 standards in a lightweight design. These precisely engineered snap rings provide reliable fastening solutions for mechanical assemblies and bicycle components. With a diameter of 21 mm and a length of 85 mm, they are suitable for various applications in bicycle headset systems and other bike components that require secure mechanical connections. Made from high-quality spring steel, these rings offer excellent durability and consistent performance under mechanical stress. The lightweight construction maintains strength while optimizing weight for bicycle applications. Each ring features precise dimensional tolerances that ensure a proper fit and function in the intended mounting holes. The spring steel material provides outstanding elastic properties, allowing for repeated installation and removal cycles while maintaining structural integrity. These snap rings come in a convenient 25-piece set, providing multiple units for various projects or replacement needs. The DIN 7346 certification ensures standardized quality and dimensional accuracy for compatibility with industry specifications. Suitable for professional workshops, bicycle maintenance, and mechanical assembly applications that require reliable fastening solutions. The corrosion-resistant spring steel construction offers long-term performance under various environmental conditions. These rings are designed for use in bicycle headsets and related bicycle components, where secure mechanical fastening is essential for safety and performance. The snap mechanism provides a firm hold while allowing for disassembly when maintenance or component replacement is necessary.