To-Air 3" Tire Grinding Cup
3" Grinding Cup, 5/8" Arbor Hole, 46 Fine Grit.
Use for cutting and sharpening truck & tractor pulling tires.
The Wheels and Cups are steel with simple brazed carbide "Grit" coating.
The crushed grit coating sizes are numbers similar to those used for sandpaper or grinding wheels.
Made in the USA
I ordered the grinding cup, it was not exactly concentric or square, but I guess most folks don't try to use it in a mill. It really removes rubber... After doing 2 tires, it seems sharp as new.