Hollywood Lower Stap, Spare Strap WIth Hook & Buckle The family favorite F4 uses heavy duty steel tubing & hardware, allowing it to carry up to 4 bikes. An exclusive dual positioning trunk/bumper system allows a custom fit on most sedans, SUVs & minivans. High strength tie down buckles & straps ensure a secure fit for heavy loads. Comes fully pre-assembled & folds flat for easy storage.