SAFELINE 3PCS SDS DRILL SET 12 16 24 X1000MMTough tungsten carbide tipped steel 1 metre long Suitable for concrete, masonry, stone and lightweight blockSpecification Size: 12mm, 16mm, 24mm Material: Steel Length: 1000mm Pack Size: 3Saber’s 3 Piece 1000mm SDS Masonry Drill Bit Set fit all makes of SDS drill. They are tungsten carbide tipped and suitable for use on concrete, masonry, lightweight block and stone