We are sorry about the description issue on HomeDepot website. This will be forwarded to the web manager for correction. The DB963 blade size is 9". For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST.
Thank you for your question. The DB963 Bosch Premium Plus Turbo 9 in. Diamond Circular Blade is designed to handle masonry material like slate, fire brick and marble, it could work for granite as well. Here is the list of blades available for granite https://www.boschtools.com/us/en/boschtools-ocs/granite-22175-c/. For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST.
Thank you for your question. The DB963 is not designed for porcelain, only stone, concrete, and brick. The DB743C or DB766C for a tile saw or the DB4566C will work with a 4 1/2" angle grinder. When cutting porcelain it is recommended to use a tile saw or a small grinder.
Thank you for your question. The DB963 Diamond Saw blade is use with an angle grinder, for dry cutting only. For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from M-F 7a-7p CST.