Custom Engraved Stainless Steel Puzzle Necklace Love Couples - Silver This is Stainless Steel 2 piece couples heart puzzle necklace with chains. Includes up to two lines of free Router engraving on the back of each puzzle piece. Email us via the amazon email system (contact seller) promptly after placing your order. Include all of your engraving instructions. If we do not receive an email from you, you will receive two email notices to your amazon email account in the following 48 hours. If after 48 hours we still do not have your engraving info, your order will be shipped blank.