The six brush tools are best for cleaning powder fouling on the line.
For regular chamber cleaning, buy regular chamber brushes from Brownell's.
These are special, extra stiff bronze brushes designed specifically for cleaning revolver chambers.
To use, twist and push the brush through the chamber once or twice and even bad leading is removed with no damage to the cylinder.
Brownell's do sell stainless versions, but these are ONLY for use on badly neglected chambers, where you have nothing to loose.
These chamber brushes work better than anything else I've ever tried, including over-caliber bore brushes.
The bristles are stiffer, and the brush is the proper fit in the chamber.