Patrick Mahomes and Kenneth Walker III have each hand signed this Chiefs Riddell Speed Retro full-size replica helmet at a private signing. This item is authenticated by Beckett Authentication Services and was signed in the presence of one of their representatives. Their tamper-evident hologram featuring a QR code and serial number is on the item. The authenticity can be verified online by entering the serial number or scanning the QR code.We are the exclusive memorabilia company for Patrick Mahomes and Kenneth Walker!Item pictured may not be the exact item you will receive. It will be similar quality; and we guarantee your satisfaction.