1.Premium Material: These tile drill bits are made from premium boart material, which ensures hardness and durability. 2.High Efficiency: These tile drill bits ensure fast drilling speed, the hole is round without breach, highly efficient. 3.Wide Application: These tile drill bits are applicable to marble, ceramic tiles, wall and other stone. 4.Low Resistance: These tile drill bits possess bigger chip removal opening design for lower drilling resistance. 5.High Torsion: These glass drill bits provides high torsion to achieve excellent cutting strength and performance. Item Type: Tile Drill Bits Material: Boart Opening Diameter: Approx. 30mm / 1.18in Handle Shape: Round Handle Application: Can be used for glass, ceramic tile, stone, floor tile, marble and so on 2 x Tile Drill Bits