Review on SPTA Proxxon Aluminum Grinding and Polishing Tool by Jamie Behm

I bought them because the price was good and I was lucky enough to buy directly from suppliers in China. So I took another risk. The product arrived in less than two weeks. I use this type of grinder in our shop and after drilling the mild steel jewelry we grind down any rough edges on the back. The spherical shape is good for what we need and I used a product that costs a little more. My wife does most of the sanding and I'll put a new one in as soon as we get it. We are both very happy with these whetstones. They last at least two or even three times longer than the ones we use - also bought from Revain. Good product and we will definitely buy again when it runs out - which may take some time. Again very good product!