Clover Chaco Liner Pen Style is a great way to mark your patterns and projects. The tapered point makes it easy for marking and it fits easily into your hand. The fine point permits accurate drawing of both straight lines and freehand curves, and also makes lines and marks more visible and is easy to use with a straight edge. They are easy to refill with screw on cartridges, sold separately.Details:Available in multiple colorsTapered pointEasy replacement