3" Beveled Grinding Puck designed for heavy grinding applications. Available in 2 configurations including plus stone holder and speed shift plate. The Concrete Grinding Pucks are designed for extended life and aggressive grinding. We offer these pucks in 5, 8, and 10 segments design. with Grits 6#, 16#, 30#, 50#, 100#, 200# and 400# etc, and three bonds: Soft, Medium, Hard. Soft bond designed for grinding hard concrete and long life. Hard bond designed for aggressive grinding of abrasive coatings and soft concrete.