Ignition point files are used as an abrasive for cleaning electrical contacts in tight spaces, generally for the removal of rust.
The components that they clean are found in car engines, and are usually coated with tungsten, which is how the file earned its other name.
What are the characteristics of an ignition point file?
Cross section
Ignition point files, also known as tungsten point files, have a narrow rectangular cross section to allow them to fit into small slots and between casings for electronic components.
Profile and cut
They are blunt, but their points are chisel-shaped. They are double cut on both faces.
Their chisel-shaped tips make them ideal for reaching inside small gaps and slots.
Size
These files are produced in relatively small sizes, usually around 131mm (51/4“). They have an integrated handle instead of a pointed tang.