The scale divider tool can be used to transfer the subject matter to canvas or paper while maintaining proportions. Easy to use. Increase, decrease or measure the size to be drawn. Painter's ratio divider is an adjustable pliers tool, the ratio is from 1:1 to 5:1, the scale is flexible and free. Suitable for any subject size. Size-The scale divider for painting is a perfect substitute for 10.24 inches art projector. Compared with drawing tools. Drawing Compass - Use the scale divider as a lightweight drawing compass, caliper tool, drafting compass or architect scale, for perspective painting and drawing supplies. the correct proportions and perspectives in drawing or painting - Students, classrooms, seminars - A simple tool to maintain precise proportions - Still life and landscape paintings can be reduced up and down to fit the canvas size. Material:plastic colour:Black Package Contents: 1 x Drawing ruler(as the picture shows) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.