The dewalt xlr sds drill bits have a solid carbide head that ensures optimum drilling performance and greater durability its 4cutter geometry provides clean holes high drilling speed and reduces the chance of jamming in reinforced concrete the optimised flute design and hardened body allows for efficient debris removal and reduced breakage supplied in a handy tough storage case contains 5 x 110mm 6 x 110mm2 6 x 160mm2 65 x 160mm 8 x 160mm2 10 x 160mm 12 x 160mm