Enough to use: you will receive 4 pieces of pen spinning in one package, enough and styles can meet your needs for daily use and replacement, you can share with your and parents quality: gaming finger are mainly made of ABS+Aluminum Alloy material, which are sturdy and solid, not easy to fade or deform, also are lightweight and reusable, material can be applied for a long time stability: the rotating pen is 8.6 inches in length, and is designed with metal weighted beads on both sides to increase the weight and balance, making the rotation more stable, offering you a good using experience Broad usage for: these can not only exercise the hands, eyes and cerebellum, a long term training helps to attention, memory and learning , in addition, it can also help you relieve the stress of work and life Have a time: spinning are suitable for adults and children to play, through the movement of to bring you a sense of relaxation, and easy to operate, bringing you a relaxed memory Cool presents option:These gaming spinning are suitable for your , colleagues, parents or someone who means a lot towards you as a on anniversary, Valentine's Day, birthday and so on, showing your care and love for and making happier. Specifications: Colour:black Material:ABS+Aluminum Alloy Package Contents: 4 * pen Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.