The Marcrist PC850 Diamond Percussion Core combines all the advantages of diamond and percussion drilling. It offers lightning fast drilling, without breakout, and without the need for special machinery. Material from common brickwork to hard concrete (80-100mm) can now be drilled dry. A Ø132mm core takes only a few seconds to drill through brick and, with an expected life of over 300 holes without re sharpening, costs only a few pence per hole. Compatible with all brands of percussion drills. A must for every Plumbing, Heating and Electrical Specialist.