I purchased this drill for private extension of the electrical installation in my new building developers. Finally, a cost-effective yet stable stone-drilling crown for normal domestic hexagon drills. According to previously drilled 8 doses in vertically perforated brick (supporting and not supporting), I can say "the passes like butter". Percussion drilling not necessary, simply by milling! Even multiple abrupt tilting by plummeting sidebars can withstand without damage the drill. In my view, a very good price / performance ratio!