Universal Fit OPEN-LOK Diamond MAX Diamond Grit Grout Removal Multi-Tool Blade (1-Pack)

Took out three stubborn lines of old grout in one pass and the diamond grit barely looks worn. The blade fits snug in my oscillating tool and stays locked even under pressure. Way better than the carbide ones I was burning through before.

Had to replace my old blade halfway through a small bathroom floor, but this one cut through all the old grout joints without slowing down. I'm impressed it lasted the whole job with no visible wear around the diamond grit edge.

Finally a grout blade that doesn't give up halfway through the job—I've been using it on a stubborn bathroom floor and it's still cutting cleanly after what feels like forever. The 15X longer life claim actually holds up in practice, which is rare.