Makita DHR263ZJ 36v SDS drill and Hilti SDS Plus TE CX drill bits. There really isn't much that this can't get through. 

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I use this mainly for making holes in walls for the inspection camera or taking samples for Calcium Carbide testing. 

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With the chisel bit (not pictured), it can also be used for chiselling up floors and removing render. 

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Below is a photo of the Hilti bits in action taking a masonry sample for Calcium Carbide testing. With good quality bits and a powerful drill, less force needs to be used to push the drill into the wall which generates less friction and heat and so provides a more accurate sample. Ramming a weak drill into the wall with a blunt bit will generate more friction and is likely to dry the sample out therefore providing an inaccurate reading.