I have bought a set of 4 checkering files,0, 00, 1 and 2 from riogrande.com https://www.riogrande.com/product/friedrich-dick-checkering-hand-files/114852GP/?code=114847

I know 0, 00, 1 and 2 refer to the amount of lines per inches. In the description:
-2 is Lines per inch: 50, Spacing of teeth: 0.50mm
-1 is Lines per inch: 40, Spacing of teeth: 0.63mm
-0 is Lines per inch: 35, Spacing of teeth: 0.83mm
-00 is Lines per inch: 20. Spacing of teeth: 1.25mm


But the ribs with checkering had a very very very small pattern and I was wondering how are they made.

on this Instagram video, minute 0.40, you can see a tool to make the parallel lines, with a very very little pattern. thinner than 0.50mm I think.

https://www.instagram.com/reel/DalIcWVIvB6/?igsh=Zm80aXZ3Nzg0a3hx

Maybe it is a home made tool???

Last edited by pacomb; 07/15/26 02:15 PM.