This tool can be used with tinfoil to create corrugated roof tiles for scale modelling.
The thing contains the tooling for two sizes: one for roughly 1:50 and one for around 1:87-1:100 scale.
Regardless of the size you want you need to print the Pin three times and a single TurningKnob.
Additionally you need to print all the files with the respective size (either Large or Small) to get a complete tool.
You can download the files individually or get the zip-file that contains everything for either size.
Cudos for the idea for making these corrugated by hand goes to Raffaele "Picster" Picca who did the corrugated sheets by hand in his amazing diorama Giu's Robot Repairs. The making of containing the sheets can be found here:
The pins and the turning knob should be printed as solid as possible while the rolls/outside are good with ~30% infill.
The size of the tool can be scaled up by scaling the Roller files asymetrically in only the height axis to enlarge the surface.
Printing the files scaled down for other sizes might result in cracking pins/turning knob depending on material and print quality.
Assembly is straight forward but be careful when pressing the pins into the roller. They are quite a snug fit and the best way is to lay the pin on a table, add the size and then press the roller down from the top against the table.