6.0mm 3D Scanning Markers for 3D Scanner, Accurate Tracking Dots, Reference Point Markers, and Diffuse Reflection for Precise Optical Tracking and 3D Scanning(200 Per Pack)

Work great, good price.

Stuck one on the end of a cheap wand and it worked to trigger the magic wand attractions at universal hollywood

They work. The price seems a bit questionable.

Great for marking scanning on 3d printer scanner

Very, very weak magnets. I can’t get them to stick to my car very well.

I have 3 different 3D scanners and all of them came with some of these stickers. If you aren't familiar with 3D scanning, the scanner generally uses light/lasers to capture the surface of whatever object you're scanning. If the surface you're scanning is too dark, too shiny, or is made up of larger smooth surfaces without any unique features, then the scanner has a tough time keeping up with what it's scanning and where it's at, and your scan will most likely be ruined. Placing these little, reflective stickers randomly over the surface of a smooth object gives the scanner something to track so it helps i align the images it's scanning into a more concise scan. If you're scanning smooth objects and your scanner didn't come with any of these, I definitely recommend them because they make a HUGE difference. And at only $6.99 (at the time of this review) I think it's a great deal for 200 of them, especially considering how much they help scan tricky items. I'll definitely be getting more once these are gone.

This work great. The stickyness is fair. They stay put and come off without to much fuss.All a counted for and scanner sees them well.

Works well, but only had about a 60-70% success rate of the adhesive holding. Which sounds good, but after spending 2 hours putting them on the mounts, it has been a pain to have to keep reapplying them.