Omnigrip 8-1/2" x 24" Non-Slip Neon Ruler, for quilting, sewing and crafts by Omnigrid. For use with rotary cutters and straight edge blades, Right and left hand numbering and angle system, diagonal line for triangle cuts. Includes 60, 45, and 30 degree angles. Omnigrip Non-Slip Ruler, 8-1/2" x 24".