These composite cutters are an excellent alternative to traditional metal cutters. They are made of fiberglass, nylon and polyamide, and will not bend or break. The top is rounded and comfortable to grip during use, and they are heat-resistant to 450° F. The six-piece set includes the following sizes: 2 1/8in, 2 3/4in, 3 3/8in, 4in, 4 3/8in, 5 1/8in. Overall height is 1 3/8-inches. They are dishwasher-safe.