These TCT multi construction drill bits deliver durability and stable drilling in different materials. Making them ideal for use on building sites because they eliminate the need to change drill bits frequently - improving efficiency. The Tungsten Carbide tip is self-centring and ultra-tough for reliable cutting performance. Double flute design prevents material from clogging the hole, providing rapid stock removal. Fitted with a non-slip shank to prevent slippage (sizes 6mm and above). Suitable for use with brick, concrete, stone, slate, tiles, sheet metal, wood and plastics. Compatible with a standard 10/13mm chuck. Supplied inside a plastic box.