If your Makita SA5040C sander isn't running like it used to, these replacement carbon brushes might be all it needs. Worn brushes are a common reason power tools start losing power or sparking. These are the exact size you need: 5mm x 11mm x 15.5mm (that's about 2.0 x 4.3 x 6.1 inches). They come with the automatic stop feature too, which helps protect your tool's motor from damage when the brushes wear down completely. Installation is pretty straightforward if you're handy - usually just a couple screws to access the brush holders, swap the old ones out, and you're back in business. Much cheaper than buying a new sander or paying for professional repair. These brushes are made to OEM specifications, so they fit and work just like the originals. Keep your Makita tool running smoothly for years with proper maintenance. It's one of those simple fixes that can extend the life of your power tools significantly. If your sander has been acting up or you just want to have spares on hand, this is a smart buy. Just make sure to unplug the tool before replacing anything! A small investment to keep your workshop running efficiently.