It's a three-part ruler that has a point on one end which is used to trace an image and a pencil holder on the other end to draw the image. It's a three-part ruler that has a point on one end which is used to trace an image and a pencil holder on the other end to draw the image. Compass and protractor are used to measure arcs and angles. The tool I was asking about is used in image sketching. It's like tranferring an image into a drawing paper. Yes, indeed. It's a "pantograph". Thanks bo_(whatever). You made my day. I just can't choose your answer as best since I still have to wait for 4 hours. But then again I appreciate your help. Does anybody know where I can buy it in the Philippines, particularly around Manila. Does National Bookstore carry that?