Final answer:
To start a drill hole in metal, a drill bit is the best and most appropriate tool. Drill bits are paired with power drills to effectively create holes that can be equipped with various metal screws for construction and fastening purposes.
Step-by-step explanation:
To start a drill hole in metal, the best tool to use is a drill bit. Drill bits are specifically designed for creating holes in various materials, including metals. When working with metals, it's important to select the appropriate type and size of the drill bit for the material and intended hole size. Once the hole is started, a power drill or socket wrenches can be used to drive screws into the hole. Different screws may be composed of various metals such as steel, brass, or aluminum, and come in different shapes and sizes, some with flat-head slots and others with Phillips-heads.