TK316 is short for TUSK Chrome steel, which indicated that your jewelry will remain stainless and you'll have no hassle cleaning it. There isn't any distinction between the markings S925 and 925; the two designate which the product of jewelry is made from sterling silver of the best high quality. https://manuelcnzjt.dm-blog.com/36908125/5-simple-statements-about-jp88-explained