Patented & High-Quality: Made of premium, high-temperature resistant resin plastic that won’t melt or warp under direct iron heat. Precise Measurement: Non-slip surface holds fabric securely for accurate seams, hems, folds, and pleats—saving time while achieving professional results. Heat-Resistant: Withstands temperatures up to 428°F/220°C and tolerates short - term ironing up to 536°F/280°C. The ruler will remain hot for a few seconds after ironing. Translucent Design: See fabric underneath for accurate positioning. Fold fabric over the ruler to the desired hem depth for faster, more precise pressing. Practical Size: Measures 10 x 5 inches with inch markings for intuitive, accurate measurement. Perfect for hemming, quilting, sewing, and other fabric projects.