Omnigrid Ruler Set, Squares

The omnigrid ruler set contains one each of 3 omnigrid quilting rulers (4" and 6 inch squares and 1 inch x 6") to execute a variety of measurements; the 4 inch square includes a 1/8 inch grid for miniatures; the 6 inch square includes 30, 45 and 60 angles; the 1 inch x 6 inch Checks and marks seam allowances. To clean: warm water with a few drops of mild dishwashing detergent. Use a soft cloth and rub gently. Occasional dusting is recommended. To remove glue or sticky surface, use household rubbing alcohol with a soft cloth and gently rub.