The Stegosaurus is a 9 Segment cup with big 1/4 round PCD (poly crystalline diamond) for aggressively removing coatings. 

Not for prepping concrete

Life varies on these blades, hitting other substrate may knock of the segments

5/8-11 threaded

I named it the Stegosaurus because the other was named the T-rex and I was keeping with the Dinosaur theme.  The segments are bigger and reminded me of Stegosaurus back plates.