This DeWalt 16 Piece SDS Plus Drill Bit Set is supplied in a plastic case and is suitable for masonry, stone, concrete, and brick/block work. It features a highly durable carbide tip for a longer life. The set contains: 4 x 6mm, 4 x 7mm, 4 x 8mm, and 4 x 10mm x 160mm long SDS drill bits. The SDS-Plus drill bit is among the best in terms of its speed, life, and endurance, offering superior carbide grade for long life and greater durability. Its optimized flute design allows for efficient debris removal, and the hardened body provides extra strength and reduced breakage. A new tip design ensures better bit penetration, longer life, faster drilling, and greater durability. The set includes: 4 x 6mm Drill Bits, 4 x 7mm Drill Bits, 4 x 8mm Drill Bits, and 4 x 10mm Drill Bits.