High-grade, robust concrete drill bit according to DIN 8039 with carbide plate 130°, especially heat-resistant, very long tool life, Special groove for quick boring dust discharge, Also suitable for light rotary hammers with a three-jaw chuck, Suitable for drilling in granite, concrete, masonry, natural and artificial stone, 5 pieces, in plastic storage case, Ø 4 / 5 / 6 / 8 / 10 mm