The Cobalt drill bit is a SDS-plus Concrete Hammer Drill with strong special tungsten carbide plate in special alloying cutting edge. Highest solidity of the hammer drill is guaranteed by a strengthening of the core, therefore maximum power transmission. It has high capacity of resistance to wear on the basic of special hardening-blastening. It is suitable for applications of drilling in granite, concrete, clinker, stone, masonry, tiles and marble. It is also suitable in all hammer drills with SDS-plus adaptor and 2-groove-adaptor as that is Hilti TE 10-22.