Fidget Chain, Delicate Gift for Adults and Kids - Gold (Screwdriver INCLUDED). Made by Metal Stainless Steel with Stable Bearing, Each Chain Is Made of High Quality Steel, Firm and Smooth. Bicycle Chain Design, 2 Golden Roulette, Mechanics Toy. (Kindly Remind: The Internal Parts are Coated with Lubricating Oil). Simple, Discrete and Fun, Also Effective for Focus and Deep Thought. Great Kill Time Toy for Computer Working Relex, Loading Game and Studying.