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Review title: Killer grout remover
Product review: Yes, you have to have a Fein oscillating sander to use the blade. The sander has a lifetime warrantee and can be used for hours at a time without problem. The blade turns out to be way cheaper than the multiple Dremmel 1/16" diamond grout-removal blades you can eat up on a large project (though I stll used one for small places). If you can swing it, the Fein sander is usually available for $290 somewhere-- plunge cuts, sands, rasps-- and is far safer than a rotary tool because of it's oscillatory motion (like a bone saw for cast-removal). It's not cheap, but is is the best tool I've found for this.
