This Dynamo is constructed with a copper (CuTe) outer ring and has a super grip (knurled and milled) aluminum spindle. It has a ceramic (Si3N4) bearing for its spin point. The top has a brushed finish and the copper will develop a patina over time. This Dynamo was crafted on a CNC lathe followed by hand finishing. The stem was knurled on a manual lathe and then milled to give you the super grip appearance. 

While spin times vary with practice and experience, the copper and aluminum Dynamo had  15-minute spin times during performance testing. All Kemner Design tops are designed, crafted, and finished in my shop. I test all of the tops for performance before shipping them to you. The Dynamo comes with a personalized owner's card that proudly displays the name of the top, birth date, material and bearing used, serial number, and maker’s signature. 

Tops can have multiple functions: They can be used for stress relief, educational purposes, display, or play. Whatever your choice, this top will provide you with hours of enjoyment. These solid metal tops are designed to last many lifetimes and can be passed down from generation to generation. 

Specifications:

1.25” around and 1.06" tall
Weighs 29g
Brushed Finish
Super Grip stem
The spinning point is a ceramic (Si3N4) bearing that is 3/16” diameter
Hand Finished
Ships in 1-3 business days
Made in the USA