MaterialMade of sturdy stainless steel, 0.3 mm thick, very sturdy, could be re-used many times. Can be used for cool, room temperature and hot food.Safe DesignSmooth cutter edge and well connecting technology to protect your hands and give you a comfortable hand feeling.Dog Bone ShapesIf you are a dog lover, you will be sure to love this 3 piece cookie cutter set with dog bones in all different sizes.Widely ApplicationNot only perfect for cutting cookie dough, but also for cutting fondant, bread, sandwiches, jelly, cheese, soft fruits, pancake, soap, craft clay.High QualityBPA free and free from any other harmful and toxic chemicals.In short,they are super dural,will not rust,Anti-corrosion and health for your body.