Final answer:
The best electric drill for making large holes in steel or concrete is a hammer drill or a rotary hammer, which provides both a rotational and hammering action to efficiently penetrate tough materials.
Step-by-step explanation:
For drilling large holes or holes in steel or concrete, the best type of electric drill would be a hammer drill or a rotary hammer. Unlike a power drill that relies on sheer rotational force, hammer drills and rotary hammers combine rotation with a hammering action to pulverize the material while it drills, allowing for larger holes to be made more effectively in tough materials. Socket wrenches, while useful for tightening and loosening bolts, are not suitable for drilling purposes. Therefore, when needing to drill into steel or concrete, especially for large holes, it's essential to select the right equipment, such as a hammer drill or rotary hammer for efficient and effective results.