They are metallic bars separated horizontally one from another, so heat can pass by. Any food that’s to be roasted is put on them. We can find the source of heat under the grill. The source of heat may be electricity, gas, coal, wood, etc.

When due to the characteristics of the fuel used (coal, wood) and the size of the grill, the regulation of temperature is needed, grills have a system so that they can be moved to get them closer or further from the heat source.