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You can never use wood or metal drilling bits to drill holes in masonry, you must use specific masonry drill bits designed for masonry. Masonry bits are excellent for drilling bricks, Thermalite or concrete blocks, mortar (cement), concrete and some tiles as well.
Choosing Drill Bits by Type
Hammer drills and rotary hammers are both excellent for drilling masonry. … Sure, you can drill a hole or two in a concrete block with a regular drill and a masonry bit, but you‘ll want to step it up a notch if you have a whole bunch of holes to drill into 50-year-old concrete.
The Dewalt DW511 hammer drill with its 7.
The only catch to using masonry bits on metal is that, since the tip is eccentric, it will drill a hole twice the diameter of the bit size.