1 1/4 inch grid
thingiverse
This roller aims to create a 1 1/4-inch grid pattern for XPS foam or a similar material. The edges should cut a 2mm groove. Roller5 is the 5 tile length roller (about 6 1/4 inches or 15.8 cm), and the Roller6 is 7 1/2 inches or 19 cm. This is currently untested, I have been about to print similar rollers without supports. However, use your own judgment. Update: 31/10/2018; I've added two more 5 square wide rollers. The ModS is slightly smaller and the ModL is slightly larger by about 1/8 of an inch. 3/11/18; I've added a file, 1_25in-grid_D__Roller.stl is designed to deal with the slippage that Roak pointed out to me. And remove the other files as the rollers will have created a distored grid.
With this file you will be able to print 1 1/4 inch grid 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 1 1/4 inch grid.