Patent ID: 7735585

Claim:
A hard material insert ( 1 ) for a drill ( 2 , 2 ′), comprising in a cross-section thereof extending transverse to a rotational axis (A) of the drill ( 2 , 2 ′), an axially central reinforcement ( 3 ); and two diametrically opposite, radial arms ( 4 ) each having a cross-section tapering radially outwardly, opposite free side ( 8 ) and connection side ( 7 ), the free side ( 8 ) of the radial arm ( 4 ) forming in an axial cross-section a straight line and passing tangentially into the central reinforcement, the free and connection sides ( 8 , 7 ) of one of the radial arms ( 4 ) being arranged alternatively to the free and connection sides of another of the radial arms ( 4 ), with a concave recess ( 6 ) provided on the connection side ( 7 ).