WRT PayPal. Per Ross' request, I always put "machined parts".
The fellow on Ebay selling the steel brushes for 80 cents each shipped, didn't do himself a favor with his poor picture. This is what they look like and you can see the small piece of aquarium hose on the large and small primer pocket cleaners I made from them. Also the pin vise jewelers screwdriver. Everyone who works on their guns should have one. It has four different collet sizes that store in the handle. Great for cleaning out holes very carefully. It accommodates shanks from sewing needle up to 1/8 inch. You can chuck the brushes in a drill as well. They last forever. I can't begin to account for how many pockets they each cleaned before I got the new bits. It's good for evening out the wear by reversing direction on the cleaning motion with them, so I never used them in a dremel as mine didn't reverse.
WRT the pocket normalizer/cleaner bits. You'd be amazed how much brass they took off of the Hornady 450b pockets to get them to spot on SAAMI spec for small rifle primers. Not all brass is created equal though. I processed 50 Hornady 6.5 Grendel brass recently and not one of them needed any brass removed. They were right on the money. No doubt manufacturing variances will always occur.
Hoot
EDIT: the brushes are also great for jeweling bolts and other SS parts, which is mainly why I bought them. It wasn't until later that I realized they could be used for cleaning pockets.