The Bosch 2608833771 SDS Plus-5X Hammer Drill Bit offers highly efficient drilling in reinforced concrete and masonry They have a 4-flute design which provides fast dust removal so the bit can slice through concrete and rebar quickly with reduced wear. The centring tip prevents wandering and geometrical form prevents jamming. Features: SDS plus-5X Drill Bit offers highly efficient drilling in reinforced concrete Centring tip guides drilling from the start for efficient work and exact hole diameters The geometrical form of the 4-cutter head prevents jamming and breakage for optimal results Turn-angle head and 4-flute design provide fast dust removal for increased drilling speeds and reduced wear Specification: Diameter: 5mm Total length: 110mm Working length: 50mm