Ingco HSDT1908 Model Number Indikator Screw is a hand tool designed to quickly and securely inspect the voltage in electrical systems. This test pen can detect hungry tensions between 100 and 500 v and allows the user to easily measure the user with a length of 4 mm width. Thanks to a transparent plastic body, the availability of tension with the internal lighting system is visually, which increases the security of the user. Compatible with a long time due to favorable design and light weight.