The Pentel Wow! retractable ballpoint pen offers a distinctive design that stands out in a crowd. The unique triangular-shaped barrel comes in variety of stylish, transparent colors to match your own personal taste. The latex-free grip is also triangular, which makes it easy to hold and keeps the pen from rolling off your desk. To advance the tip, simply click the top; click the side button to retract. 1. 0mm metal tip writes medium lines. The ink colors match the barrel colors for easy color selection. All Wow! pens are covered by pentel's exclusive limited lifetime .