Makita SDS-MAX ZENTRO bits are designed for intensive work with natural hard rock, reinforced or reinforced concrete. Form high-precision holes, have an extended service life. Symmetrical, 90° angled, 4 cutting edges made of high-strength carbide guarantee stable drilling even in reinforced concrete. Centering point at an angle of 130 gr. ensures high drilling accuracy and stable drill guidance in the hole. The wear marker is an indicator of the preservation of the geometric parameters of the drill. While the marker is visible, the drill forms anchor holes that are within tolerance in size.