Material: zinc alloy_x000D_ Dimensions: 30x60mm 11. [Material] The use of high-density zinc alloy material, repeated processing and polishing, let your fingertips enjoy more fun. 22. [Design] Ergonomic design, 36-60mm fingertip gyro sprocket is more suitable for human hands, comfortable playing, high balance, and long-term use. 33. [Function] It is an ideal toy to maintain concentration, reduce stress, and release inner creativity and imagination. The fingertip gyro gear can relieve stress and help restore the mood of the elderly and young people. 44. [Use] The sprocket rotating at your fingertips is not only an interesting toy, but also allows you to concentrate. It is ideal for office, school, travel or family. Addictive fun! Keep your hands busy, not on your phone! 55. [Perfect Gift Selection] Exquisite gifts for men, women, children, family members and colleagues. For Christmas candy fillings, favored by Thanksgiving or birthday parties, it is also suitable for classrooms, offices, easy to carry, and can be used as a portable toy set for everyone.1*Gearwheel Gyro Toy