The British OC Robotics Company has just launched a snake-arm shaped robot that is able to dig around in inaccessible places to detect bombs (anti-terrorism), inspect a machine (cars, etc.), search through rubble (explosions, earthquakes, natural disasters), etc.
For example, one of the videos below shows a robot of the “Explorer” product line, inspecting the underside of a car.
These robotic snakes have a 4 to 15 cm diameter.
Rob Buckingham, OC Robotics Director said that his Explorer snake-arm robot series will be particularly suited for use in confined spaces for inspection or maintenance tasks.