Rotating discs
thingiverse
Just a small, handy tool consisting of three spinning disks that can rotate freely in any direction on their own. It's perfect for calibrating the first layer height or width, as well as the extruder itself. The space between each disk is a precise 0.4 millimeters. Leaving a thumbs up is greatly appreciated and it's always wonderful to see awesome pictures!
Download Model from thingiverse
With this file you will be able to print Rotating discs with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Rotating discs.