1No Harm: The bike block fork mount will not damage the roof when installed on the car roof rack; equipped with installation tools, it is more convenient to use. 2Hook and Loop: High strength hook and loop, easy to bind the crank to prevent the crank from shaking, prevent the pedal to wear the roof and protect your car. 3Powerful Tool: Aluminum alloy main part is hard and resistant to pressure, safe and stable. Rear wheel fixing pad has 2 radians, suitable for different models. 4Easy to install: No need to disassemble repeatedly, can be placed over and over again after installation; Easy to install with quick release lever. 5High Compatibility: With high compatibility, suitable for most models; good helper for carrying bikes outdoor.