Correct grip when using a low voltage test pen
Commonly used low-voltage test pen, master the two-grip test method. Pen-type test pen, the palm touches the metal clip. Thumb index finger and middle finger, pinch the middle of the pencil holder.
Rotary chisel-type test pen, the index finger presses the metal cap on the tail. Thumb, middle finger, ring finger, pinch the middle of the plastic rod. The neon tube small window is backlit, and you can observe it towards yourself.
