Omniedge-A clear 4x36 ruler. 1/8 lip catches on mat to prevent slipping. Lip is easily removed to position ruler as desired. Highlighted outer edges reduce cutting errors when trimming 1/4 seam allowances. Numbers and marks highlighted for easy reading and accurate cuts. Ideal for cutting straight and bias pieces. Includes 45 and 60 degree angle lines and 1/8 grid.