Quick Release Design: The knobs allow you to quickly access your traction boards without any tools. Bolt-on Installation: These traction board mounting pins can be easily installed with all necessary hardware included. Perfect Fitment: This mounting kit allows traction boards to be attached to a roof rack or truck bed rack with M10 holes. Efficient: Provides emergency traction for vehicle tires, helping the vehicle gain grip on snow, ice, mud, or sand. Material: Made of high-quality steel, sturdy and durable. Strong structure with fine workmanship, high strength and solid construction. Easy to Install: Simplifies installation steps, no modification required, no additional instructions needed. Color: Black and Silver Material: Plastic and stainless steel Package Contents: 4 x bolts, 2 x boards Note: Light reflection and different display settings may cause slight variations in the color of the item in the picture compared to the actual product. Measurement may vary by up to 1-3 cm.