DEWALT SDS Plus EXTREME 2® Drill Bit Set, 4 PieceDEWALT SDS Plus EXTREME 2Drill Bits are made from superior carbide grade for long life and greater durability. The hardened body adds further strength and helps to reduce breakage. Its optimised flute design provides efficient debris removal whilst the tip design ensures better bit penetration. This 4 piece set contains the following sizes: 5. 5 x 160mm, 7 x 160mm, 8 x 160mm, 10 x 160mm.