This brush works very well on tiled floors and grout leaving them looking almost new. I didn't notice any damage to the grout and the textured unglazed tile finally looked clean. The brush did not scratch the glazed tile floor in the shower. Don't be fooled by the looks of the "Oreck Commercial 237058 Corrugated Polypropylene Orbiter Orbiter Scrub Brush" which you will receive from the one pictured. This blue Oreck brush now has an off-white collar but it is the same brush that Oreck sells - I only discovered this after returning the first blue brush I bought from Revain and then to the Oreck store 39, Paid $99 + taxes. If I didn't need to use my Oreck scrubber right away, I would have reordered this brush from Revain back then. I reordered the brush to have a spare on hand.