Reliable: The rotating pen adopts a symmetrical design, the pen tip is made of soft rubber, the pen barrel is made of ABS material, and the dynamic balance support ring is made of aluminum alloy, which is reliable and strong, and can be used for a long time. More stable: This rotating pen is about 21.6cm / 8.5 inches long, enough to use; stainless steel beads are embedded at both ends of the pen to achieve a balanced weight, so you can easily turn the pen. Decompression toy: This rotating pen is suitable for children and adults; you can use this pen to train your hands, eyes, thereby improving your concentration, memory and learning ability; it can also help you relieve work and life pressure. gifts for gifts: You can give these game finger pens as gifts to friends, relatives, colleagues, and classmates on Thanksgiving, Christmas, New Year, birthday and other holidays to express your love and care. Note: This product is a Spinning Pen, excluding refills. If you add the refill yourself, you will lose your balance when you turn the pen. It is recommended not to add refills, thank you type: D colour: blue-black Material: ABS+aluminum Package Contents: 1 x Spinning Pen Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.