650nm red light laser module industrial laser module adjustable focal length6.2mm(point-2packs)

I used the pair to make a focus and locating indicator for a laser cutter. They have good focus range and spot shape and sturdy well protected wire pigtails.

One star just because they lit up, but the line is way too thick (3/16") to be usable. There is not enough threads to focus it down to a thinner line.

They are VERY small but quite powerful. I am using them to make a laser guided drill press and so far it is working. an old 5volt phone charger supplies power.

Focal threaded adjustment could be better with more friction

I tested it with 3.7V and with 5V. Works very nice with both voltages. You need to play with the lens on the front (screw in/out) to adjust it to a fine thin line (or wider if you like).

They are just OK if you do not have high expectations. I was able to do what I needed to do but the adjustable side of the laser was barely attached, that was the only position where the laser line was somewhat focused. I think that if the adjusting portion of this laser would be 3mm longer this would be a good item.

I purchased this laser lamp to replace a broken laser beam on my miter saw. The light worked brightly enough, but it is a diffused light. The beam is approximately one inch wide, which is too wide for a miter saw guide, as it needs a hair-thin light.

Exactly what I needed.