Dart SDS+ Hammer Drill Bit is a premium quality masonry drill that ensures fast and effective drilling in all masonry - even the hardest granite and concrete. The drill bit features a carbide tip for high durability and performance, with a centring point to enable accuracy when drilling. The patented core reinforced flute geometer is incredibly strong to resist damage and also enhances the speed of drilling. This Dart SDS+ Hammer Drill is 8mm in diameter and 210mm in length.