This BlueSpot 8 Piece SDS Plus Drill Bit Set is manufactured from high-quality heat-treated carbide steel with a sandblasted finish and a carbide tip for exceptional durability. Ideal for use on concrete, mortar, brick, and stone. The set comes complete with a handy carrying case for quick and convenient storage. It includes drill bits of the following sizes: 5mm x 50mm (110mm), 6mm x 50mm (110mm), 8mm x 50mm (110mm), 6mm x 100mm (160mm), 8mm x 100mm (160mm), 10mm x 100mm (160mm), 12mm x 100mm (160mm), and 8mm x 150mm (210mm).