Tri Mini Compass Stemless Top
Man, these things are so much fun!
What are they?
Well, they were machined as Tri Mini's but failed QC due to balance.
But now they are steamless tops or 'Adult Beyblades" as Jamie Williams calls them.
I machined out the 1/2in bore to 9/16 and pressed in a 9/16 Chrome Steel ball bearing then blasted and tumbled each of them.
The Titanium one spun around 5min on a ATS Crystal base. I feel it could do 7+ min with the right spin.