Proportional scale divider: the proportional scale divider tool can align your desired subject matter in the small end of the divider and fer the spacing of the larger end to your drawing<br> Easy to use: there is a locking device so that you can keep the same proportion on your drawing<br> Adjustable: by moving the blue tab, the scale can be adjusted from 1:1 to 1:5, adjusted for any subject size<br> materials: our proportional scale divider is sturdy and light, easy to carry and available for long-term use<br> Model Number: proportional<br> Type: Compasses<br> Weight: 25g<br> Measuring tips:<br> 1. Use small end of divider to measure the height of the desired object.<br> 2. fer the spacing of the large end to your drawing .<br> 3. If want to change size of drawing, move the blue tab towards the middle of the divider to reduce the fer size, or move the blue tab toward to enlarge the fer size.<br> colour:Black+<br> Material:plastic<br> size:26 x 1.8cm<br> Package Contents:<br> 1 x proportional scale divider<br> Only the above package content, other products are not included.<br> 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.