Built with 304 stainless steel, the core of these Kuuk tools seem to work well with all cooking. They haven't had any bends/breaks and haven't seen any rust issues from the use so far. The silicone is nice because it is flexible and can form slightly to the pan you are using to help get the food out.
The Kuuk tools are made with 100% Food-Safe Materials. They are BPA-free and the silicone is heat-resistant up to 440°F. This also means they are 100% dishwasher safe (top rack) or wash by hand with warm soapy water.