For fast, aggressive stock removal. Designed for use on your angle grinder to get close to edges with minimal sweep marks. The grinding cup to use when you are wanting to grind down high patches to the desired level. Premium Middle Bond - 30/40 grit high quality diamond for reliability and speed. Aggressive “L” shaped segments are specifically engineered to produce the desired results (aggressively removing concrete surfaces and other hard construction products). Open air ducting enables cooler operation than other cup wheels, providing fast stock removal and longer grinding life.