The proportional scale divider tool is not just for architects, but also a necessary tool for the artist.The tool allows you to transfer an image into the same scale as well as smaller or larger dimensions. If you need to draw the subject a different size from the reference image, the simple tool would help you to draw easier. Features: Proportional scale divider:the proportional scale divider tool can align your desired subject matter in the small end of the divider and transfer the spacing of the larger end to your drawing surface Easy to use:there is a locking device so that you can keep the same proportion on your drawingAdjustable: by moving the blue tab, the scale can be adjusted from 1:1 to 1:5, adjusted for any subject size Durable materials:our proportional scale divider is made of sturdy and light plastic, easy to carry and available for long-term use Package includes: 1 x proportional scale divider Specification: Color: black and purple Size: 26*1.8cm/10 x 0.7 inch Weight: 25g Material: durable plastic material Measuring tips: 1. Use small end of divider to measure the height of the desired object. 2. Transfer the spacing of the large end to your drawing surface. 3. If want to change size of drawing, move the blue tab towards the middle of the divider to reduce the transfer size, or move the blue tab toward the end to enlarge the transfer size.