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Different materials (e.g. wood, metal or stone) require different drill bit types. The best-known drill bits are called twist drill bits due to their appearance and shape.
Brad point drill bits– A characteristic feature of these bits is their thin point in the middle of the tip, which is used for centring. Wood drill bits are usually made of a chrome vanadium alloy (VA).
Metal twist drill bits– Metal twist drill bits are divided – depending on the material – into three categories. They are made of High Speed Steel (HSS).
Stone or masonry drill bits– For drilling hard materials made of stone, masonry and concrete. The cutting edge is equipped with a tungsten carbide chip and is normally chisel-shaped.