Amazon.com: Dremel MM500 1/8-Inch Oscillating Multitool Blade for Grout Removal, Fast Cutting Carbide Accessory - Universal Quick- Fit Interface Fits Bosch, Makita, Milwaukee, and Rockwell , Gold : Everything Else
Dremel 1/16" Multi Max Grout Removal Blade MM501U from Dremel - Acme Tools
Dremel Multi-Max Cordless 2-Amp 20-volt Variable Speed 8-Piece Oscillating Tool Kit with Soft Case (2-Batteries Included) in the Oscillating Tool Kits department at Lowes.com