Pen

The utility model provides a pen, including the cap for brush and the pen -holder of mutually supporting, the cap for brush covers and a pen clip including a cap tube, and the pen -holder includes pen-holder barrel and pen point part, cap tube lid has the three first tangent plane that extends from its first end to its second end, and three first tangent plane circumference is encircleed a cap tube lid and a first tangent plane and pen clip and is the axial symmetry for pen's center pin, the pen -holder barrel has the three second tangent plane that extends from its second end to its first end, and three second tangent plane is configured as and grips a circumference around the pen -holder barrel, in a cap tube lid upper shield pen point part, the first end of the seamless concatenation pen -holder barrel of second end of a cap tube lid, three first tangent plane corresponds the three second tangent plane of concatenation respectively, forms the oval joint surface that pen was encircleed to three circumferenc