Review on AUSTOR Sanding Kit with Sleeves and Mandrels by Robert Ryokan

Not the best quality but they do the job and are a fraction of the cost of Dremel parts. They are definitely not the same quality as Dremel parts, these fall apart much quicker BUT so many sanding drums for the price I paid. I can not complain. If you are looking for general purpose grinding discs these will do the trick. If you're looking for a durable disc or a perfectly formed disc, then this isn't for you. I use them for firearms work and general workshop work, so they're great for my purpose.