Need a tough blade for cutting grooves in stone, concrete, or tile? This 90mm (about 3.5 inch) diamond saw blade is built for that. It's a thickened blade (this one is 5mm thick, but other thicknesses from 3-15mm are available) designed for dry cutting – no water needed. It's made with a sintered diamond edge, which is great for hard materials. The main use is for carving slots or grooves in stone walls, concrete floors, or even for creating patterns on pavement. It fits a standard 100-type angle grinder (check your tool's arbor size – this blade has a 20mm hole). It's a multifunctional blade that can handle grooving, bottom cleaning, and light engraving work. Just one blade in the package. Remember to always wear proper safety gear (glasses, gloves, mask) when using this kind of cutting disc!