Pilot Dr. Grip 41 4 Color 0.7 mm Ballpoint Multi Pen 0.5 mm Pencil - Series I - Blue Body (1, 24.5 IN) 4 colors of ball-points and a mechanical pencil became one It is distinguished in writing by a color to use always. The 4-color ball-point and mechanical pencil of black / red / blue / green become one, and are very convenient Even if it continues writing, it is famous as Penn who cannot be tired easily.