Buy from eBay - 7 Watt NUB44 laser pen for $250?

[rajhlinux]

Is that a belt pully I see on the end?

Yes, to get a safety hold on it. I hang it on my wall.

 

[rajhlinux]

Here is the video, this laser is really powerful. Playing around with it for the first time, good stuff:

One thing I do not like is that it has a circular outer artifact.

 

[wolfram]

next time use small button magnets for contacts.