Equipped with ultra-low friction jet stream inks. This is a multifunctional pen that combines a 0.03 inch (0.7 mm) black and red permanent ballpoint pen and 0.02 inch (0.5 mm) mechanical pencil. The world's first revolutionary ink delivers a smooth writing experience with low writing resistance. Also, since the ink dries quickly, it reduces the stress of getting dirty hands. Twin ball mechanism also prevents ink backflow and includes a built-in spring tip to prevent ink leakage from reaching the nib.