From Thinkgeek:

A long time ago in a galaxy far, far away, there was Powerpoint. (The Empire is all about bureaucracy. You know they had Powerpoint.) In order to draw attention to important parts of presentations, Grand Moffs would point with lightsabers, but when they got carried away over ROI, they’d put it right through the expensive projection screen, and somebody’d have to call to get it replaced. It’s a costly business. Much like leaving the projector bulb on. Looking at you, Executive Team.

So instead, IT shrank down the corporate lightsabers so they’d do less damage and then modified them so that they could project a beam of light for emphasis. Problem solved. We managed to get our hands on some through a galactic surplus auction, and that’s how we can offer you this lovely Star Wars Darth Vader Lightsaber Laser Pointer at such a reasonable price. Even if you’re not the corporate type, get one so you can be evil to your pets, whom we can guarantee will NEVER catch the red dot, no matter how hard they try. Such a Sith thing to do. Muhahaha.

[Star Wars Darth Vader Lightsaber Laser Pointer]