Materials: Cement, brick, refractory, sandstone, terrazzo, slate, etc ... Description: The best value for money disc in the market. Advantages: The 12 mm. diamond segments height extends disc endurance as compared to the 7 mm. high segments discs. The slots between the diamond segments supply a faster cut, a better waste riddance as well as improved disc cooling. The holes on the steel frame improve cooling and reduce heating when cutting.