Fisher Space Pen Tough Touch is the ultimate outdoor tactical pen with stylus tip. The barrel is machined from a solid piece of aluminum, and held together with brass Dowling. The outside stylus tip is for use on any touch screen device, and helps you type faster with greater accuracy, reducing smudges, scratches & oil Marks. The pressurized refill has a 100 year shelf life, and writes in extreme temperatures (-30 Degree to 205 Degree).