DeWalt DT7943 Extreme Flat Wood Spade Bit Set This set is suitable for use on natural hard and soft wood, chipboard and other man made materials. Ideal for door locks, mortising, electrical and plumbing work. Features and Benefits Extra thick robust steel shank for outstanding durability and bit life Chamfered outer cutting spurs for clean, very fast drilling and extended drilling life Precision ground central point with optimised design for faster material penetration and increased drilling speed Includes Flat Bits: 12, 16, 18, 20, 22, 25, 28 and 32mm Dewalt DT90237 Tri Flute Impact Ready Auger Bit 3 Piece Set The Dewalt Tri-Flute 6x drill bits are ideal for drilling wood and offer 6x faster drilling penetration than a standard flat bit. Their 'Tri-Flute' design allows for faster chip ejection and their full screw tips ensure ease of use and pull through. DeWalt's Extreme series have the been designed on the Irwin Blue Groove bits with the added benefit of being impact rated with 1/4" hex shanks, making them suitable for use in impact drivers as well as all standard drills with a jawed chuck. The cutting spurs produce clean holes with minimal break out and the tapered flute reduces binding. The drill bits are also heat treated for extra durability. These stubby drill bits are 10cm (4in) long, making them ideal for drilling through joists or in enclosed areas. Suitable for holes up to 5cm (2in) deep. This 3 Piece Stubby Dewalt Wood Bit Set ideal for drilling wood and offer 6 times faster drilling penetration than a standard flat bit. Their 'Tri-Flute' design allows for faster chip ejection and their full screw tips ensure ease of use and pull through. The cutting spurs produce clean holes with minimal break out and the tampered flute reduces binding. The drill bits are also heat treated for extra durability. Self Feed Tri-Flute Drill Bits are designed for all types of general wood drilling. Ideal for electricians, carpent