4pack Pen Spinner Exercise Flexible Fingers Professional Rubber Black Samurai Spinning Pen Item Name: Spinning PenMaterial: ABS,TPR RubberFeatures: Stress-relieving, Wear-resistant, SafeSize Details: Length: 22cmBy playing with the finger spinning pen, you can exercise the hands and eyes, and relax yourself from the bustling work or study, adding more fun to school and office life.It can exercise flexible fingers, turn out brain vitality with symmetrical balance point and central sight assisted exercise features. It can cultivate children's hand-eye coordination and hobbies, which show its multifunctional.TPR thermoplastic rubber tip is anti-collision and shock absorption, anti-skid and wear-resistance with rebound protection, double-layer nickel-plated steel ball counterweight, increase the swing force and enhance the dynamic balance. Made of premium ABS material, it is lightweight, eco-friendly and anti-deformed.