The Crain No. 771 Natural Waxed Linen Thread is a specialized sewing thread designed primarily for hand-sewing carpets, including seams and edge binding. It consists of waxed three-cord natural linen wound on a cardboard bobbin. The natural wax coating reduces friction, allowing the thread to pass smoothly through carpet backing while providing high tensile strength for durable seams. The thread features a natural beige color that blends seamlessly with the hessian backing of most carpets.