Daleks are an extraterrestrial race of cyborgs created by the scientist Davros during the final years of a thousand-year war against the Thals. He genetically modified his race (known as the Kaleds), and integrated them with a tank-like, robotic shell. His final modification was to remove their ability to feel pity, compassion, or remorse. The Daleks soon came to view themselves as the supreme race in the universe and began a conquest of universal domination and extermination
These caged Daleks could be dangerous but are securely fenced in so provided you keep an eye on their weapons, a sneak up from behind and you should be right!
You are looking for a magnetic nano and you may need a long tool to extract it. Have fun and stay safe!