
When the small copper brush is used to repair the running line, it can be used with a multimeter. It is troublesome to find the line point with a single test pen.Connect a multimeter pen to the copper brush, select the buzzer gear for the multimeter gear, and then use the copper brush to find the point on the circuit board so that it is more convenient to find.The small copper brush is made of high quality stainless steel and copper for durability and long life