Description: Material: Made entirely of stainless steel, this Heavy Duty Eye Bolt is sturdy, capable of withstanding various harsh environments.Universal Fit: With a universal design, the Eye bolt tie down set is suitable for various vehicles, ensuring a suitable match with your existing roof rack.Roof Rack Expansion: The Stainless Steel Roof Rack T Bolts can be used to expand the roof rack, increasing additional load capacity to meet your travel needs.Design: The ring strap bolt design allows for easy installation and securely fastens luggage or other items to ensure safe driving.Versatile Use: Not only applicable for roof racks but also useful for securing other equipment or accessories, enhancing the vehicle's loading capacity. Precision manufacturing ensures sturdy and reliable fixation during driving, safeguarding your travel. Specification: Thread Diameter M8Length 1.4cm/0.55inchOuter Ring Diameter: 3.4cm/1.34inchInner Ring Diameterl 2cm/0.79inch Package Includes: 4Heavy Duty Eye Bolts Note: Please allow slightly errors 1-2cm differences due to manual measurement.