This pen spinner contains ahigh-quality gyroscope.Its perfectly centered so it keeps spinning for ages. You will enjoy watching the wonderful pattern it creates as it spins. The surface of the pen is also shiny smooth without any rough edges or burrs. It willfeel like polished glassin your hand. It also has an extra bright mini-LED on the other end.Press it to light itThe light makes some cool effects when you spin it.And its also ideal as a backup light for those times when you need a little extra light to look for something.