16/20 Grit Soft Bond Trapezoid Diamond To Quick Open Old Surface
Hard Concrete Floor Grinding.
Using 16/20 Soft Bond trapezoid diamond shoes with double bars to initially prep the surface in order to quickly expose new concrete face. As you can see the dust produced simultaneously and scratches left on the floor.
Considering the hardness of surface, suggest to set the grinder's speed to around 4 out of 9 to little slower rotate so as to grinding the floor effectively and deeper per pass