This is a handy little tool and used for sharpening gravers.  It has a metal roller, aluminium body and two brass positioning screws for correct angles.  A graver is placed in either of the two angled openings and rolled over a flat oilstone to sharpen. Note- Photographs are for illustration purpose only.  Actual item may slightly differ from the pictures shown. Scorpion is committed to providing the customer with the best source for value possible on the market. You will enjoy the quality, function and usefulness of our products.