Electrostatically safe Wera tool. Kraftform micro ESD handle for safe protection against electrostatic energy and the resulting damage/injuries. Electrical surface resistance: Up to 10^9 ohms. With ergonomic Kraftform grip for comfortable, effortless work. Black roll stop prevents the tool from rolling away. For bits with a 4mm half-moon drive and bits with a 4mm HIOS drive. Perfect for the installation of smartphones, cell phones, cameras and electronic devices, as well as in dental laboratories and dental practices.