Don-Jo Scotch mount U guard. Made of 0.050-inches thick 300 grade stainless steel. Satin stainless steel finish. Available in 36-inches length. Fastener: #6 x 5/8 FH SMS. Options: cutouts for flush bolts, lock strikes, locks, and hinges. All Stainless Steel is made with a process of a minimum of 80 percent scrap stainless steel. The scrap used has shown that it is comprised of 15-20 percent post consumer scrap, 40-50 percent post industrial scrap and 8-10 percent home scrap..