Diamond Carbide Replacement Blade (non-sanded grout joints 1/8" and smaller)
(You save $1.90)
This diamond shaped carbide cutting blade features a radius point of 1/64" and will easily scrape out non-sanded tile grout joints 1/8" and smaller.
Use the two cutting points on one side, then flip over the blade and use the other two points when you have a big grout job and want to keep a consistent sharp edge. But don't worry, they'll last a long time! (Price / 1 Blade ea.)