[This review was collected as part of a promotion.] I used this drill to grind several holes through the porcelain tile backsplash in my kitchen using a diamond-encrusted drill bit so I could mount a microwave bracket. It took several hours of slow-Ish grinding with frequent stops to keep the tip wet and cool in order to keep the porcelain tile from cracking or chipping. This drill not only held up, it didn't even get hot. Lesser-quality drills with a brush-style motor would not have been able to do that.