Replacement Concrete Floor Diamond Grinding Blocks for Edco, Stow and General Equipment Floor Grinders, 6 Pack - EDCO6

These replacement are the worst that we used in our professional life. We don't understand why says that with these can achieve "the maximum performance and extended life" and "Longer life and a very aggressive bite". Really is totally the opposite. The production was less that 3.000 sqf, while with the dymaserts original from EDCO we have done more than 53.000 sqf. And don't speaking about the bite. Definally we were disappointed.One star is a lot for this product,,,