These are accessories for the Vividia usb digital microscope seen here:http://amzn.to/1fPsfxcThe 2 axis manual stage is good for making small measured motions. Using the 1/4-20 thread with the point of the hex nut as a displacement indicator you can measure down to .0083"Silly putty works great for a holding the stage to the scope mount.The software for the scope is free here: http://www.oasisscientific.com/downloads.htmlRead more about why plastic turns white under stress here:http://engineerdog.com/2015/07/31/why-does-plastic-turn-white-under-stress/Video Here: https://www.youtube.com/watch?v=L5n8iTlBCfo&feature=youtu.be&a