Features: Practical toys: For autistic and hyperactive adolescents and adults who usually fidget, the bike chain toy is both useful and funny. It can keep them focused, relieve stress, anxiety and pressure in life, and calm them down. Durable and portable: The roller fidget chain toy is made of quality stainless steel and rubber for durability, coming with resistance to rust and corrosion, which are also lightweight, compact and portable, so you can put the roller chain toy into your pocket, briefcase, or backpack, and then enjoy playing with this anxiety relief toy at will. Specifications: Material: stainless steel and rubber Size: as shown in the figure Color: as pictures show Quantity: 2 pieces Package includes: 2 x Six roller bike chain toys Notes: Manual measurement, please allow little size errors. The colors may exist slight differences due to different screens.