The Fein StarlockMax Carbide 214 Saw Blade features the 4-1/8" diameter blade and Kerf 3/64" that are designed to cut very narrow marble, epoxy resin, and pozzolan grouts. This blade is not recommended for using on very hard epoxy or cement grouts. This blade has the StarlockMax mount, which means this blade can fit on Fein SuperCut Oscillating tools and Bosch Oscillating tools with the StarlockMax mount.