Starrett's range of SDS-plus-5X drill bits are specially designed with a centering tip for active and accurate centering in concrete. They feature a 4-cutter geometry that prevents jamming in rebar and breakage. The drill bits also feature a 4-flute design for fast dust removal, providing higher drilling speeds and longer life. Features and Benefits Special flute geometry designed to give fast material penetration and maximum debris removal Split point 130 to achieve accurate and fast drilling with hammer action; less pressure required for penetration Precision ground carbide tips for consistent performance 4 cutting edges with 1 centering point 4 vertical debris removal channels Appropriate for all rotary hammers with SDS-plus holder Diameter x Total Length: 5 x 160; 5.5 x 160; 6 x 160; 8 x 160; 10 x 160 mm (1 each) Applications Suitable for: Alloy steels, carbon steels, cast iron, hardened alloy steels, stainless steel, wood and soft materials Approvals and Standards Metr