Four cut carbide tipped SDS-plus drill bit set (5-piece) in plastic container ( 5.5 x 110 mm and 5.5 / 6 / 7 / 8 x 160 mm). Embedded solid one piece carbide with centering tip for easy spot drilling and long life time. Four symmetrical 90 degree cutting edges guarantee perfect round holes for anchor fixing as well as reduce the risk of the drill bit jamming when hitting rebar. The high volume flute geometry ensures optimum dust removal. 4 spiral flute design provides lowest vibration and low uniform flute wear. Suitable for brick, concrete, reinforced concrete and natural stone.