Sterling 8 mm cord has a very durable sheath and high MBS which makes it great for prusik cords, cordelettes, ice threads, lightweight low-stretch fixing and hauling in.tag in. lines. Can also be used in nonlife safety applications such as dog leashes, towlines, or even as decorative trim and cover. General-purpose utility cord. Very durable sheath and high MBS (minimum break strength). Ideal for chocks and fixed line. Sold by the foot. NOT for use in lead climbing or rappelling. Can also be used for towlines, dog leashes, and as decorative trim.