Offers highly efficient drilling in reinforced concrete. Geometrical form of the 4-cutter head prevents jamming and breakage for optimal results. “Turn angle” head and 4-flute design provide fast dust removal for increased drilling speeds and reduced wear. For efficient work and exact hole diameters, the centring tip guides drilling from the start, to prevent wandering, which can falsify the hole diameter. Intended for use on masonry, concrete and reinforced concrete.