Seam line and cutting edge are both marked at the same time. Will not tear pattern sheets as the wheel does not have a sharp or serrated edge.
Want to copy a pattern without damaging the original? Use this great tool to do it! Together with carbon paper and some inexpensive pattern paper (any paper will do), quickly and easily copy a pattern so you can make adjustments to the copy and save your original! Even add or subtract seam allowances with the adjustable wheel width. This is a must-have tool for anyone doing pattern alterations! We love this tool!