Low height copens may come into contact with the ground when driving on a sudden ramp or wavy road. In addition to being exposed to the ground, it may damage the body, as well as the bolt may deform, and the cross beam cannot be removed. This is the "Copen Super Low Head Bolt" for those who are concerned about such problems. The super low head is just about 0.2 inch (4 mm) for extra clearance and peace of mind. Compatible information: CopenRobe Celo Express (L880/LA400) Set Includes: 10 Bolts with Ultra Low Head Hex Hole + 10 Dedicated Washers Product Dimensions: Bolts M10 x 35 mm P1.25 Washers / 10 x 22 x 3.2 Rustproof Treatment: Bolts / Black Oxide Washers / Nickel Plated, Can be used for cars other than Copen Coating if the size matches. Installation and Usage Precautions When installing this product, please use a screw lock agent and tighten it at about 30.0 N - 35.0 N m - 35.0 N m depending on the situation. The black oxide film is recommended to be maintained regularly as the oil film on the screw surface may cause rusting. We are not responsible for any accident or damage that occurs when using this product.