So many of these combinations are available, it can make you dizzy if you don't understand how they relate to each other. But once you do, it's much easier to not only select the right drill, but also the right combination of features. The concept is simple. The bigger the motor, the bigger the drill bits , the slower the turning speed, the more twisting power generated. The smaller the motor, the smaller the drill bits, the faster the turning speed, the less twisting power generated.
Powerful drills are best for making big holes in tough materials.
Less powerful drills are best for drilling metals and running high-speed sanding and grinding attachments. In fact, they're so well liked and adaptable that many people work them harder than they should. The ability of this drill to both drive screws and drill holes with the greatest of ease makes them perfect for everything from hanging drywall to setting pilot holes . Many people choose to buy attachments for these drills, instead of investing in a drill designed specifically for the job. You're better off using the right drill for the job.