Features: Ergonomic handle for maximum comfort and exceptional torque. Includes 6 various types of magnetic bits to meet different electrical needs. Insulated design of test pen supports withstanding voltage up to 500V. Made of chrome vanadium steel, hardened for maximum wear resistance. Plug-pull tip design, easy to install and replace the bits, time-saving and efficient. Comes with a transparent storage case, convenient for storage and portable for use.