7 Pc Multi purpose drill bit set - Designed for cordless low /min multi-purpose drilling. In tests they produced between 90-129% more holes per battery charge than leading competitors. Four-facet ground carbide tip for lower drilling pressure and better centring. Combined drilling into wood and brickwork: the Cordless Drillbit is excellent for such drilling jobs - where you drill through wood into brickwork. Only one drillbit is needed to do the job and will drill a wide selection of different materials like: Brickwork, Ceramic Tiles, Breeze Block, Wood, Dry Wall, Gypsum Board, Limestone, Slate, Marble, Eternite, Plastics/Reinforced plastics. Set contains: 4, 5, 6, 7, 8, 10 and 12 mm drillbit sizes.