A pneumatic drill is a tool that uses compressed air for generating rotation and is a great tool in certain job sites where an air compressor may already be in use. Some of them are designed to handle both your tough and smooth operations. They have different styles like right angle and pistols styles and are available in industrial , light and general duty. Air drills are more compact than electric drills which allow them to fit into tighter places. They can't be overloaded , but an electric drill if you overload it too much, you will eventually burn it. An air drill will tolerate hard use better than electric drill and With continued use, they get cooler. Because they have no sparks they are safer in explosive environment like surfaces with flammable paint , than electric drills.