GRCTDB4P Size: 4" Grip-Rite premium diamond saw blades are manufactured to meet the most rigourous industry requirements. ISO 9001 and 9002 manufacturing insures that Grip-Rite diamond blades adhere to the highest quality standards blade after blade. Other brands may add rim height, but reduce the most important cutting element; the diamonds. With 40pct more diamonds, Grip-Rite high diamond-concentration matrix is the key to the long cutting life and fast cutting speed of these blades. Features: -Available in several sizes. -Premium quality continous rim tile blade.