Anti-slip Handle: The pen electric tester adopts anti-skid handle which is more stable and safer while use.The top of the handle is equipped with a high quality copper button, touch the button when measuring electricity, easy to operate. Multipurpose: Mains Tester Screwdriver is perfect for checking circuits, fuses, switches and wiring on automobiles, trailers, boats, motorcycles.The dual purpose electrical test pen can also be used as a screwdriver. Superior Performance: The electric tester screwdriver has good performance and stable quality. 100% brand new and high quality. Safety to Use: Test Pen Screwdriver--The pencil electric test screwdriver shaft is wrapped with a rubber stratum to ensure your safety. 2 Choices: Electrical Tester--The rod of the screwdriver has 2 directions of different shapes to meet your different needs.