Is your Makita drill or saw getting weak, sparking a lot, or just not starting? Worn carbon brushes are a common fix. This is a genuine Makita replacement brush set, part number 194435-6 (also called CB-441). It fits a bunch of Makita tools like the CB441/442/432 cordless drills, the DTW450 impact, and various DSS and BSS series saws. Replacing these little blocks of carbon is often way cheaper than buying a new tool and can bring your old faithful back to full power. They're the electrical contact inside the motor. If you're handy, it's an easy repair. Keep your Makita tools running for years longer.