● Sprocket Fidgets Chain, Gears Linkage Bike Chain Design. Made of Stainless Steel, Gunmetal color, high quality, smooth, full of mechanical sense. | ● Perfect for someone who enjoys endurance bicycling. Easy to carry, simple, discrete and fun, also effective for focus and deep thought. | ● Great Toy For Fidgeters. Perfect for waiting in lines, meditation, timing, quitting bad habits, striking up conversations, and more. | ● Helpful: Increases Focus and Attention for Teens and Adults with ADHD, ADD OCD, and Autism. | ● It makes a truly great and original present that creates a bit of magic every time you interact with it. Each unit is designed with attention to the smallest detail and built to last a lifetime.