Ed, I will take a crack at it. If you have a bench or pedestal grinder in your shop and the wheel needs dressed, this is the tool. It is used to reface a grinding wheel. It will take the grooves out of the wheel. It will take any angle put on the wheel off. It will make the face of the wheel parallel with the shaft if you hold your mouth right. You put the two feet like on the tool rest, hold the handle and engage the star wheels on the face of the grinding wheel. Then you move from side to side on the wheel. If you hold at the right position, you will make a lot of dust and a viberation with a lot of noise. As for loading " I am loading one in my truck now". Actually it will clean a wheel that is loaded with steel, lead,or wood. So my guess is, "a hand held grinding wheel dresser".