Dewalt 16 Pce SDS Plus Drill Bit Set supplied in a plastic case Suitable for masonry, stone, concrete and brick/block work, with a highly durable carbide tip for a longer life. Set contains: 4 x 6, 4 x 7, 4 x 8 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. Superior carbide grade for long life and greater durability Optimized flute design allows efficient debris removal Hardened body for extra strength and reduced breakage New tip design ensures better bit penetration, longer life, faster drilling and greater durability Includes: 4 x 6 mm Drill Bits 4 x 7 mm Drill Bits 4 x 8 mm Drill Bits 4 x 10 mm Drill Bits