Shoelace Lock
thingiverse
These look like regular old buttons but they're not. The holes are sized for shoelace aglets. When installed, these will keep your shoelaces tight on your daily run.
Download Model from thingiverse
With this file you will be able to print Shoelace Lock 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 Shoelace Lock.