The line diameter is approximately 3.6mm.The surface is painted on the surface.As the hook part is large, it can be used for a wide variety of use, such as bags and belts.The opening and closing parts are approximately 5.5mm thick and can be passed through. *The chewing part of the carbina is not colored due to its coating on the manufacturing process. * In the manufacturing process, a small air bubble may be contained in the paint.Please be careful. *Please note that it is not for mountaineering.