Boring bits

Boers

— tool for processing various materials by drilling with impact. More specifically, drills are mainly used for hard materials like concrete and stone. You need to install such a tool in a rotary hammer, in extreme cases — in an impact drill (if the design of the cartridge allows). Note that the drill acts on the material much rougher than the drill, so it cannot be used with delicate materials (thin stone, brick with voids).