These are self-drilling screws that connects components in one work step. They drill, form the thread and fasten hence reduces the installation time, saves tool changes and costs for drills. They’re designed to eliminate the need for predrilling a hole before fastening as they can drill their own hole and secure themselves in a single step. They are particularly useful when working with materials like metal, wood and plastic, where pre-drilling can be time-consuming and may weaken the material.