... it.The almost 3" dia wheels -- (1) for buffing, (1) for grinding -- are variable speed, up to 10,000 ... bits, and can save you the cost of a rotary tool. The 6-ft power cord has a 3-pronged ... it. The almost 3" dia wheels -- (1) for buffing, (1) for grinding -- are variable speed, up to 10,000 rpm ... a 3-pronged grounded plug. Comes with detailed instructions for use and safety, and this reminder from A.S. ...