Unique design: our identity anti-theft stamp is printed with meaningless letters, which can well hide your identity information and prevent some criminals from knowing your private information. moreover, our roller stamps have densely letters, which better protects individuals completely information. Premium material: specially formulated oil-based ink designed to hide information. made of non-toxic material, our stamp roller ink set kit it's the perfect tool for your home and office to help the prevention of identity theft. unlimited refilling of ink】- equipped with 3 ink refills, when the ink runs out, you can refill the ink in the roller stamp, ordinary water-based ink does not provide the same protection.