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These little laser diodes are very useful as location 'sights' on my laser cutter/engraver. I'm sure there are dozens of other projects they can be used for too. They are bright and the dot is pretty round, but not that crisp on the outer edge, but I am going to experiment with a form of filter to see if I can hone the dot to a finer point. However, for the price, they represent great value as they are.
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