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Terrible product, none of the tools lasted any longer than ten minutes before being completely worn out. I was only trying to remove sanded grout from shower walls. Typical "Made in China" garbage. I should have known better than to trust this would be any different than most other items that are imported from China. Look for a better quality product if you want any longevity. I ultimately bought a diamond bit tool made by Milwaukee. It was a bit more money but I did my entire shower grout removal and could do another one.