The stainless steel is polished to achieve a brilliant luster and provides a distinctivemaintenance free environment. Both materials are nominally rated at 170000 psi tensile strength and come in both hex and 12-point heads. For th e Stainless Steel set see Part # AR3951. All content on this website is copyrighted. No part of this website, including text, photos, or illustrations may be copied without the prior written permission of Classic Industries®.