$69.99 Dremel Multi-Max 1/16 in. Grout Removal Oscillating Tool Blade-MM502 - The Home Depot
Richard Replacement Grout Remover Blade - White - High Carbon Steel - 1 3/16-in Blade L 05515 
Dremel Genuine OEM 1/16 Grout Removal Blades # MM502-2PK | eBay
