Durable quality: the rotary pen is made of non-slip, wear-resistant and pressure-resistant materials, durable and easy to grip; both sides of the pen are designed with metal pin heads and silicone caps, which have better drop resistance. Ingenious design: the two ends of this rotary pin are weighted to achieve the golden balance point and improve the flexibility of use; the weighted silicone cap design can easily find the balance point in the rotation process, making the rotation more stable and flexible. The kit includes: you will receive two different colours of rotary pins (black and blue), the size is 22 cm / 8.66 inches. Our pens are not only suitable for experienced people, but also for beginners. Decompression toy: pen turning model is suitable for children and adults; with this pen you can train your hands, eyes and small brain and improve your attention, memory and learning ability. It can also help you relieve the pressure of work and life. Perfect Gift: The rotary pen is very suitable for office workers and students and is a good tool to relieve anxiety. This is a good gift for family and friends, office workers and students.