From Marcrist
Marcrist diamond core system for drilling holes in porcelain, granite, marble, and ceramic tiles for pipe connections, shower fittings and wall fixings. Key Features PG850 the ultimate diamond drill for tiling professionals Exceptional life Drills the hardest porcelain fast and without chipping Lasts up to 600 holes in hardest porcelain Perfect for use on drills or cordless drills Kit contains Water swivel with quick release pipe connector Pressure feed bottle 1 X 6mm PG850 drill core Adjustable drilling guide (6 - 80mm) 2 metres connecting pipe (8mm outer dia) Large and small core extraction tools 2 x core spanners Sturdy carry case (inc room to accept additional drills)