The Milwaukee 2691-22 is a 18-Volt Compact Drill and Impact Driver Combo Kit by Milwaukee and they are what you need for difficult jobs.
Let us first talk about the compact drill - It has 400 inches/lbs of torque and yet at the same time, it is compact and only weighs only a mere 5.3 pounds, making it very easy for it to be carried around.
A power tool is a term which is used for mechanical tools which often run on electricity or a compressed air motor. They might sometimes be powered by a gasoline engine as well .The term power tools, sometimes can also be used more generically for techniques or methods which simplify the complex or tough jobs. Power tools are primarily classified as stationary or portable.