What is jimping? How do I do it?

Jimping is the process of using files to grind notches into the spine of your blade. The notches can help with thumb grip for particular uses. That said, most practical-use knives will not have jimping ground in, as it’s not required. More often than not, they function as decoration and eye candy. There are some amazing jimping designs and patterns out there, and it’s easy to do yourself with some fine files.