Faithfull standard masonry bits are for use in chucks up to 13mm capacity and suitable for general purpose drilling including bricks, blocks and cement render when used in an impact or percussion drill. Roll formed and treated body with a heavy-duty Tungsten Carbide tip and fast spiral for quick waste removal. Set of 5: 5, 5.5, 6, 6.5 and 7mm. Set of 8: 4, 5, 5.5, 6, 6.5, 7, 8 and 10mm.