This set includes bits for drilling into metal, timber, masonry and plastic. This Set also has bits for driving common fastener types including PH1-3, HEX5, SQ2 and T30. The HSS drill bits are suitable for drilling into timber, metal and plastic. They’re made from a durable high-speed steel with superior strength, heat and wear resistance for drilling. Their black oxide coating significantly reduces friction and heat build up to maximise bit life. A 135° split point helps prevent bit wandering. With a 3-point design, the Brad point drill bits can be used for creating clean holes into timber. The masonry bits are effective for drilling into stone, bricks and cement. Use the spade bits to cut small holes into timber ranging from 12mm-25mm. The HSS, brad point and masonry drill bits also have sharpened bit edges to produce faster and cleaner holes into different materials.