Clogged files cut poorly, and the Swix T177B File Brush is the small tool that keeps them clean. It's a handy brush for clearing metal filings out of file teeth. A clean file cuts faster and more evenly every time it touches an edge.
It's cheap insurance for an expensive file; a few strokes after each use keep the teeth clear and working.
Swix designed this brush for cleaning files, and it's meant for all maintenance of steel edges. Run it along the file after each session to clear out filings so the teeth keep cutting cleanly.
Every edge kit with a file should have one. It's a simple habit that makes files last and cut better.