Impact drills are portable percussion drilling machines working on electric power connected with a cord to the mains power, used for drilling in brick wall, concrete, metal, wood and plastic. Also been used to do screw driving and hole saw cutting. Impact drills are hand operated drilling machines with additional impact hammering function for making holes in masonry walls, concrete and many other materials used for home & office repairs, also used in Industries like construction, wood working, metal working, fabrication, manufacturing, maintenance, etc,