HIGH QUALITY ---- This is a planar mirror with Smooth surface no defects chamfered edges no burrs to prevent hand scratches. Apply to spinning top. A LARGER BASE ---- Diameter 4.7 inches larger than normal base. For a small spinning top it has plenty of room to activity. Please place the base on a flat surface to prevent the top from leaving the base. Manufacturered by Joytech. EXTEND TOP SPIN TIME ---- Experiments have shown that when the top is working on a smooth surface it can extend the spin time reduce bottom friction and reduce resistance. MULTIPURPOSE ---- This isn't just for spinning the top you can also display other items on the base. If you like to drink tea you can even use it to place your teacup. RAPID STATIC ---- When your gyro works on this base it helps the gyro get into a stable and quiet state more quickly once it settles down it looks like it's "frozen" motionless in place.