Expert Quality, heat treated tungsten carbide tip to withstand extreme heat generation and ensure longer life. For use in concrete, brick and other similar materials. Packed in plastic storage case. Contents: 1 x 5.0 x 110mm drill bit, 1 x 6.0 x 110mm drill bit, 1 x 7.0 x 160mm drill bit, 1 x 8.0 x 160mm drill bit, 1 x 10.0 x 160mm drill bit