How do you measure circles or lines on your models? Often cutting masking tape to cover a circular area is guesswork. Well, no longer. This simple tool allows all model makers to raise the accuracy of their masking. This measuring tool is printed onto strong but flexible transparent plastic, allowing you to lay the tool on any surface to measure the area you need to mask accurately. Once measured, you can then cut the masking tape you need, safe in the knowledge it will fit perfectly.