Features: Reliable material, the rotating pen is symmetric design, pen barrel is made of-pc, and the dynamic balances support-ring is made of alloy, and the top with metal balance balls which is reliable and can be applied for a long-time. More stable, this spinner pen with 4pieces free glow-sticks, which is long enough for-you to use; and both ends of pen are embedded with metal tip for counterweight, which makes it easier for-you to turn pen. Stress-reliever toy,pen spinning mod is suitable for both children and adults; you can use this pen to train your hand, eyes and-cerebellum, so you can improve your concentration, memory and learning ability; it can also help you relieve the pressure of work and life. Nice gift choice,you can give these gaming finger pens as-gifts to your friend, relatives, colleagues, classmates on thanksgiving, christmas, new year, birthday, etc, to show your-care. There are 8 style optional ,you can choice follow your need. Specifications: Pen Barrel Material:Pc Color:Black,Blue,Red,Green,Purple Glow-Stick Length:approx 20.2cm/7.95inches Pen Length:approx 21.5cm/8.46 Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item. Package includes: 1 Piece Spinning Rotating Pen