Food grade stainless steel material: The biscuit cutter set is made of food grade 304 stainless steel, the material is thickened, durable, not easy to deform, and rust-proof. 12 Pcs 304 Stainless Steel Biscuit Cutter Set, Round Cookie Cutters for Baking (1/2/3/4/5") with PP Storage Box, Dough Pastry Cake Circle Cutting Ring Molds, Non-Rust Double Thickness & 2.1‘’ High.