The Sandvik range covers a hard plastic abrasive selection of shaped finishing tools,the abrasive circular sharp texture is very clever and you will wonder how these tools cope with wood,alloy,plastiks etc but cope they do and very well.
Each tool is shaped to fit the hand and very comfortable to use and is mounted onto a flat base which is very accurate,you can rely on a good mating surface with the use of these items.
Suppliers in the UK are Hobbies from London,these are the people who do the annual catalogue full of goodies that appears on the bookstands every year,I have not done a search on the web for them but no doubt there must be someone handling them ?
The good point about the tool is that they are much cheaper than the traditional superb Permagrit metal bars,a particular use for them is to put one in your field kit,they are versatile and suit the need to have an abrasive block on standby and above all they will not break the bank.
Give them a try,I think that you will like them.