... wheels -- (1) for buffing, (1) for grinding -- are variable speed, up to 10,000 rpm. Best of all, it has a ... eye protection. It's not as strong as a big bench grinder, but it's a very cool hobby tool!Product ... wheels -- (1) for buffing, (1) for grinding -- are variable speed, up to 10,000 rpm. Best of all, it has a ... protection. It's not as strong as a big bench grinder, but it's a very cool hobby tool!