Package Content Set of 4 sets of 6mm, 12mm, 18mm and 25mm bias binding device, good quality, strong and durable, which is better to sew it. Sewing bias binding is facilitate your sew, for the fabric is stretchy and easier to work with when sewing curves and angles. Wide Application With this sewing bias binding, which allows you to place your bias tape on rounded without the fabric puckering, suitable for making fabric glue-on bracelet, and other DIY project. MaterialThis bias binding is made of high quality plastic material, ergonomic design, without Too bad for your hand. How to useThis is how to use it and for details, please see picture 2.1. Fold the top of the fabric strip 45 and pass through the bias binding. Use a punch to help pass. 2. Extract the strip of fabric, keeping the two sides of the strip of fabric symmetrical, then iron it with an iron.