Amazon is selling the Smith & Wesson Tactical Pen & Knife Combo Pack for only $18 + Free Shipping.

From Amazon:

This tactical stylus/pen allows you to select, sketch, draw, take notes and express yourself creatively on most touch screen devices including but not specific to Apple iPad, Droid smart phones, and Kindle eReaders. When you wish to use the instrument as a normal pen you simply unscrew the stylus cap exposing the writing tip. The cap can be screwed onto the opposite end of the pen for easy storage. Smith & Wesson Stylus Tactical Pen CNC Machined Black T6061 Aircraft Aluminum Screw Cap with Replaceable Stylus Tip Pocket Clip Includes One Schmidt P900M Parker Style Black Ball Point Ink Cartridge. This little number combines Smith & Wesson's characteristic smooth action with a slip-resistant rubber handle, making it a reliable workhorse for heavy-duty jobs. The nonstick 440C stainless steel tanto blade cuts even the toughest materials like a hot knife through butter, and its thumb stub opener doubles as a finger guard. In order to prevent it from opening accidentally, Smith & Wesson gave this knife a little more opening resistance, which makes it a great addition to your emergency kit. If you ever find yourself in a jam, you'll be glad to have this pocket knife in hand.