Useful addition to your toolbox. Brass fill brush
Brass is a soft pliable material, so this brush is particularly suited to jobs where marking or damage needs to be avoided, for example when cleaning the electrodes on spark plugs
Nylon fill brush
The nylon fill on this brush will not rot, so makes it suitable foe engine cleaning and general de-greasing. The flexible nature of the nylon allows awkward and round shapes to be cleaned easily
Stainless steel wire fill brush
The semi-rigid fill of this brush is more suited to removing debris, rust and generally preparing surfaces prior to painting or welding.
This material will not rust when used in conjunction with wet cleaning agents.