The Bosch is a SDS Plus-5X Hammer Drill Bit 5.5 x 100 x 160mm. The SDS plus-5X Drill Bit offers highly efficient drilling in reinforced concrete. The geometrical form of the 4-cutter head prevents jamming and breakage for optimal results. The “turn-angle” head and the large and short dust removal channels within the 4-flute design provide fast dust removal so the bit can slice through concrete and rebar quickly with reduced wear..The bit is intended for use on masonry concrete and reinforced concrete.