Six diameters for versatility - Diameters: 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm provide options for a range of hole sizes and applications. Hex shank design for secure tool compatibility - Hex shank fits into all power tools more easily and securely, especially for locking into quick change chucks, reducing slipping and improving change speed. Self-aligned thread head for precision and cleanliness - Self-aligned thread head helps position the bit accurately on wood for easy drilling. - Produces clean, flat-walled holes with smooth chip discharge for better results. Auger wood drill bit set for tough and varied materials - Suitable for drilling into soft and hardwood, MDF, plywood, and lumber. - Also effective on railroad ties, landscape timber, tree stumps, as well as plastics and aluminum alloys. - Designed to create deep and clean holes quickly, enhancing efficiency on demanding projects. Practical use scenarios - Installing invisible floating shelf brackets in softwood or hardwood structures, where precise, clean pilot holes are required. - Outdoor timber work such as preparing posts or connections in railroad ties and landscape timbers, where deep, clean holes improve fit and durability. - General woodworking and DIY projects that involve plastics or aluminum alloys, enabling accurate starts and smooth chip removal for high-quality holes.