DjuiinoStar 4" Spinning Top Base, -30cm Focal Length (Single Concave), Edge Polished, Diameter 3.9"/10cm, Thickness 0.55"/1.4cm, Weight 0.54lb

I got one of those small spinning tops because I guess I am a gadget person. I started looking for a spinning "surface" but everyone I saw had a flat surface. That is fine if you a consistent in getting the top to spin in one space. It seemed like a convex surface would make more sense as it would tend to naturally guide the top to the center of the circle.It took a lot of searching but I am pleased that I found this product. It was just what I was looking for. It and the top sit on my breakfast table where I can set the top to spinning while I am eating. And it does, in fact, tend to direct the top's spinning to the center of the disc.

It says the edge is highly polished… It is not polished at all… In fact, it has many chips in it, and is completely rough. Complete garbage for this price, there are better options that are actually what they claim to be.

I tried a few other over the years, but there's something about this one that makes it work so much better. Might be the angle of the glass but it makes the Spinning Top balance so well in the center of it, that it just spins for ever... well, for much longer then any other surface I've tried.It also looks very good. Un like other glass "lances" sold on here, It is well polished all the way around.

Gave as a gift with a forever spin top. My husband absolutely loves it. Helps pass long days in the office.

Exceeded my expectations! This spin base is well made and looks elegant. I was able to achieve 15 plus minutes spin on some of my favorite precision tops. \(^_^)/