The curved, brass safety pins are particularly suited for quilt and patchwork projects. They are extremely rust-resistant and can therefore remain in the work piece for a longer time as well. Their curved shape allows it to easily pierce and affix several layers of fabric. The pins also have a high level of fastening force when opened and closed frequently, since the brass used has balanced spring force. Prym provides the golden pins in sizes 27 mm and 38 mm