There are a variety of ways in which you can use your laser pointer and having changeable heads for your laser pointer pen will allow you to perform multiple tasks as your need dictates without the necessity of having several laser pointers. Here is a high powered green laser pointer pen that can be used to perform any task in any profession.  It goes beyond the normal functions of making presentations, inspections, signaling, guiding, star pointing or star gazing and others.

This powerful 5mW, 532nm Green Laser Pointer projects 5 different images, it is capable of projecting a brilliant green dot, an arrow, a straight line, a hair like cross or circle on any surface, day or night. The interchangeable heads are usable in any given situation; it gives you the flexibility to make up your own use for this functional green laser pointer.