The Vaunt 'Endurance' 5 piece cross tip drill bits set is built to last in the toughest materials!! The Cross-tip design ensures that all 4 cutting edges work at the same time to increase durability, overall lifetime and to provide an even drilling action. Special flute geometry for increased waste removal. All this adds up to a very efficient, hard-wearing drill bit! Contains the most popular 5 sizes 1 x 5.5x110mm 1 x 6.5x110mm 1 x 5.5x160mm 1 x 6.5x160mm 1 x 7x160mmDesigned for endurance and durabilityIdeal for hammer drilling into hard materials such as; concrete, granite, brick & marble4-way TCT ‘cross-point tips’ are more efficient and hardwearingsuitable for hard materials including engineered brick, concrete, reinforced concrete