Write upside down with this 12-pack of uni-ball Power Tank RT bold-point 1.0mm black-Ink black-barrel retractable ballpoint pens. Write effectively in the toughest conditions with Power Tank Retractable Ballpoint Pens from uniball featuring a 1.0mm medium point. Designed to perform optimally in extreme conditions the pens feature a pressurized ink cartridge that offers fast and clean writing even on damp surfaces in bitterly cold conditions or at unusual angles including upside down. The refillable ballpoint pens come with a textured rubber grip that encourages greater writing comfort. uni Super Ink has pigmented particles that create an Incredible bond with the paper helping you create fraud fade and water resistant documents even in harsh environments. The 1.0mm medium point offers bold strokes with a rich color payoff for clear writing. When you need a rugged writing tool this refillable ballpoint click pen is the best choice in any hemisphere. • Indelible hybrid ink blends the smoothness and vibrancy of a gel pen with the fast drying speed of a ballpoint. • 1.0mm pens feature a medium tip that delivers outstanding readability. • Refillable ballpoint pens have uni Super Ink that protects against water fading and fraud. • These ballpoint pens have a textured rubber grip for work in harsh weather. • The best rugged writing tool for the jobsite - whether at your desk or out in the elements. Pressurized ink cartridge works at odd angles and in cold weather or wet conditions. • Sold as 1 Dozen.