These 72-degree diamonds are perfect for english paper piecing. They're cut from a wash away stabilizer often used for machine embroidery. Using this type of stabilizer will allow you to thread baste or glue baste your 72-degree diamonds with Elmer's Washable Glue Sticks and then hand piece them together. Once the 72-degree diamonds are basted there is no need to ever remove them! One pack includes 100 pre-cut 72-degree diamonds.