Good value for money
Purchased a couple of these to try, with a degree of sceptisism, after using various other makes with varying degrees of success, have just discarded the first after drilling around 25 holes through very hard imported limestone flags and a similar amount of holes in porcelain flags, I would call this an excellent result and a better product than some branded drills at 3 times the price, we used it with the adaptor in a drill with only an occasional cooling of water, so effectively dry.