I bought this drill bit, started drilling a hole in low revolutions and low pressure. After 3 minutes I only made half of the hole and the drill bit was burnt. I really couldn't believe it, also it was not the first time when I was doing it on gres. Then after googling a little bit, in Leroy Merlin Spanish forum I read that this drill bit from Dexter is for wet-use, not dry. The funny part is that NOWHERE on this web page there is info about dry/wet use
Thank you for opinion . It was forwarded to the department responsible for this product for correction.