Features: Precise fit: 8mm inner diameter specifically engineered for T8 leads screws, ensuring a perfect matching that enhances systems stability and operational efficiency. High-strength materials: Manufactured from premium engineering plastics or metal alloys, offering excellent wear resistance and compressive strength to guaranteeing long-term use without deformation. Simple Installation: Thoughtfully engineered for straightforward, rapid assembly not requiring specialised tools, enhancing user experience. Versatile Applications: Suitable for assembling and securing components in printers, machines, and other automated equipment, with broad applicability across mechanical fields. Enhanced Safety: Locking rings mechanism effectively prevents loosening, ensuring stable component positioning during operating and boosting overall equipment safety. Specifications: Component：Metal Outer Diameter about 14mm/0.55in Inner Diameter about 8mm/0.31in Isolation design: Unique isolation column design Package Includes: 2pcs Fixed rings note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution