Review on AUSTOR Pieces Mounted Abrasive Grinding by Matthew Goyette

I bought these for deburring aluminum with a Dremel tool. The shanks fit my Dremel tool perfectly, but they didn't work with aluminum at all. As seen in the pictures, the stones were clogged with aluminum and quickly lost their ability to cut. Maybe they're good for other materials, but useless for aluminum. You will notice in the second picture that half of the stone is filled with aluminum and half of the stone is not. This is because the stone is not round and only half of the stone is in contact with the metal when it is cut.