ALVIN 24 inch Wood Pantograph

ALVIN 24-inch Wood Pantograph "Create enlarged or reduced drawings up to 10x scale." I bought this device several years ago and never used it - so it looks brand new. However, when I looked inside the box, there is a small metal piece missing (see the picture of the instructions above with the arrow pointing to the missing piece). That's why I have it for sale for only $10. Check their prices online... What you see in the pictures is what you get + and instructions. To see how it's used, there are plenty of videos online that demonstrate how it works. >>>I don't recommend this tool for children to use since there are several pointy screws on it that are used by this device. I'm in Old Town Chicago. Available any day from noon to 5 pm. Thanks!