Omnigrid Marking Ruler Trio

Three convenient lengths: 4", 6", and 12". Their center lines are exactly 1/4" from both edges of the rulers, providing an excellent reference line for marking 1/4" sewing lines, adding and checking seam allowances and marking 1/4" quilting lines. Do not use with rotary cutters, knives or other cutting instruments, rulers are designed for marking use only.