Bosch OSC212RF 2 1/2"x1/16-inch Carbide Grit/Grout and Tile Blade (Discontinued by Manufacturer) 12 Pin design provides a secure connection for high-torque oscillating tools (tools not included) Patented BiM manufacturing - only manufacturer that can weld HSS onto HCS in a circular design; others can only weld in a straight and linear fashion Applications: Removing grout between closely set tiles such as accent tiles.