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 colours to match your own personal taste. The rubber 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. The ink colours match the barrel colours for easy colour selection.