Various materials (e.g. wood, metal or stone) require different drill bit types. Drilling in masonry: impact drill or rotary hammer is required for drilling in masonry made of stone or concrete. Beside the right drill, you also need drill bits for drilling in concrete. Such a drill bit has soldered – in carbide plates on the drill bit tip. Drilling in glass and ceramic tiles: special rotary ceramic drill bit is required for drilling tiles, ceramics and marble and glass drill bit is required for drilling glass, bottles and porcelain Drilling in metal: HSS drill bits are suitable for drilling non-ferrous metals, iron and alloyed carbon and plain steel. Drilling in wood: The brad point bits and spade bits are usually used for drilling in wood. The brad point bits with their sharp point in the middle and four sharp corners enable accurate drilling. Spade bits are used for rough boring. They tend to cause splintering when they emerge from the work piece.