Non-slip with black markings. Compass point for cutting and marking right angles. Measurements are clear on dark & light fabrics. Easy to read numbers and gridlines. 1in grid with 1/2in, 1/4in, and 1/8in increments. You won't find another square ruler with OLFA's patented compass pivot-point angles. You will, however, find that this OLFA® ruler makes any project easier, whether you're working with fabrics, paper or other materials. 

Good For: precise measurements and cutting angles for sewing and quilting