Description: HEAT RESISTANT MATERIAL --- Made of special heat-resistant material,very durable. so it is not afraid of the hot steam of the iron. STRONG PRACTICABILITY --- Patchwork control ruler measure, mark, fold, and press deep hems, long hems, and miter corners use with Dry or Steam Iron.The ruler design is very user-friendly and practical. SPECIAL DESIGN --- Put the ruler in the middle of the fabric, fold the fabric over, you can clearly see the size of the ironed part.The ruler has a round angle,which is convenient for measuring special parts; there is also a right-angle design that is used to measure the horizontal and vertical dimensions of the fabric. EASY TO USE --- Simply fold the cloth, align it to your desired angle, and press it with iron to sew hems in no time.This ruler has a non-slip surface that holds the cloth in place to prevent it from going anywhere and make things easier for you. WIDE COMPATIBILITY --- Suitable for various sewing and hemming tasks as you can use it with either dry or steam irons! Reduce your sewing time while still making precise hems! Specification: Material: Plastic Size: 30x10cm/11.8x3.9inch, 20x10cm/7.9x3.9inch Package Includes: 2 Pieces Hot Ironing Ruler