Vde tested to 10 000 volts to ensure completely safe working on live equipment up to 1000 volts grip tip technology that reduces the risk of cam out and slipping tip type marked on the end of the handle for easy identification ergonomically shaped head so it turns easily in the hand and ridges along the head that gives better grip and extra power in that last quarter turn long fine neck for the ultimate fingertip control thats needed when turning machine screws