Rotating Pen Set : You will receive 12 pieces spinning rotating pens with different designs. Each pen comes with writable refill and weights ball, bring you better use experience, enough quantity for daily use, replacement or sharing with friends. Writable & Refillable : These rolling finger pens have a refill inside, It can be used as a normal gel pen for smooth writing. Just to unplug one end of the pen cap to use. Refills can be replaced (without additional refills) and reused. The 2-in-1 design allows you to use them in more environments. Ingenious Design : Both ends of the pen body have metal ball weights, which can better maintain balance and flexibility. The pen body has a non-slip coating and creative pattern design. The soft silicone pen cover can protect the pen from being broken and increase durability. Quality Material : Made of high-quality ABS plastic, metal and silicone materials. Length: 19 cm/7.5 inch. Weight: about 20 grams. The proper length and weight can provide a comfortable use experience, suitable for long-term use. Functional Tool : Spinning rotating pen can exercise the flexibility of your fingers and help you get rid of the pressure of work and life. You can also use them as writing pens or gifts for classmates, colleagues, etc. at any time.