Write smoothly with the same brush strokes width. Round tip type twin markers! [Features] Even those who dont like a chisel tip (square core) markers can easily write without worrying about the direction of the lead without worrying about the same brush stroke. Equipped with "Koipitinki" that allows you to write securely on both craft tape and plastic bags. Equipped with our company-developed Coipitinke that can be written on craft tape and plastic bags that were not able to write well with conventional oil-based inks. Stress-free writing.