Diamond Burs For cleaning out beads

I'm come to the end of my dentist burs that I have been using for cleaning out my beads they were a freebee.
I've had a look on the internet and find that a company called Eternal Tools, sell diamond burs, where do you get yours?

I'm stopping using my reamer as I've got some Silicone carbide grit coming, it's supposed to be really good.

Whats that then Cornish?
&
How do you use it?

It's a grit that cleans out the hole. You use a mandrel the same size as you made the bead on, wet it dip it in the grit, wet the bead and clean the hole. Supposed to be quick easy and has good results. I should get mine this week I can let you know how I get on with it.

The place to get it is mango beads here's the link:
http://mangobeads.co.uk/glass-and-tools/japanese-lampwork/silicon-carbide-grit