The product in display is Machinist Square Set of 3. Made of Steel. Very useful in measuring 90 degree angles and checking the straightness of an edge or surface. A very useful tool in design. There is even a small notch at the inside corner of the square to prevent dirt or debris from accumulating and affecting how the square reads. Does not have measurements on it. Set of 3 Measuring approximately 2, 3, and 6 inch. Note - Remember to wear eye protection. 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.