Circle cutters are made of 18/8 commercial grade 304 stainless steel, making them strong so they retain their shape, are rust-proof, dishwasher safe, and tested to be oven safe up to 500F degrees. All stainless steel Rolled top edges, to protect your fingers during the cutting process. The donut cutter set has no sharp dangerous seams and a smooth clean edge on the bottom for easy cutting. Biscuit cutter set 10 different graduated sizes, ring diameters: 1.33 inch – 1.8 inch - 2.2 inch - 2.75 inch - 3.14 inch - 3.66 inch - 4.05 inch - 4.56 inch - 5.03 inch - 5.51 inch, and all are 1.02 inch high. The biscuit cutter set is widely used: including cutting cookies, pastries, dough, fondant, empanadas, crumpets, tarts, canapés, donuts, vegetables, English muffins, bread, ravioli pasta. Use it for baking, cooking, frying eggs or making pancakes. The biscuit cutter set has good design packaging, convenient storage and makes it a perfect gift for any occasion.