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Purchase Practical Exam Textbooks: https://smartstore.naver.com/kebimall... Purchase Practical Exam Materials: https://smartstore.naver.com/kebimall Let's learn about the electric drill, which is essential for the work. While screwdrivers are usually the most commonly used tool for control panel work, an electric drill is absolutely necessary for piping work, if only to save time. In this video, we will look at the electric drills most frequently used and recommend a lightweight electric drill for use in control panels. #ElectricianPracticalExam #ElectricDrill #PublicDrawing