On my last order, i got a couple packets of these. Talk about a ton one hell of a handy tool.
I have a special set specifically for cleaning & oiling of firearms, another for cleaning my powder tubes free of dust when i switch in between powders.
I think they'll even do a good job at cleaning the hard to reach area's of my round ball molds.
Tried cleaning the face of the QRBP but it didn't work to well for that area. But i'd imagine i'd work great at being able to scrub clean a hollow base breech plug like the TC Omega uses or any other breech plug that uses the hollow base.
The supplied picture doesnt show much so i will have to take some better pics it looks like.