Highest drill speed thanks to reduction in friction and improved impact transmission thanks to the special cutting geometry on the chisel-shaped drill head., Stable and durable centering point for high-precision spot-drilling, Power breakers cause micro tears in the material for a noticeable quicker drill progress, The probability of snagging on concrete reinforcements is significantly reduced thanks to enlarged armouring phases., The 2-spiral helix with its helical geometry with reinforced core ensures quick delivery of bore dust and maximum breakage resistance, For use in concrete, masonry, natural stone, granite, Contents: Ø 5 x 110 mm; 6 x 110 mm; 8 x 110 mm; 6 x 160 mm; 8 x 160 mm; 10 x 160 mm; 12 x 160 mm, Ø 5, 6, 6, 8, 8, 10, 12 mm, L = 110/160 mm