[High Quality] - Made of high-carbon steel with a titanium coating for long service life, drills holes quickly and cleanly in hard or soft wood [5 Sizes] - Contains 5 different diameters: 6mm, 8mm, 10mm, 12mm, 14mm. You can choose the appropriate drill bit according to your needs during work. [Hexagonal Design] - Hexagonal design, not easy to slip and stronger [Advantages] - Reasonable structural design, smooth and easy drilling, high usage efficiency, smooth hole wall after drilling, and smooth chip removal [Practical] - 5-piece (230mm) hexagonal shank drill bit set, suitable for wood, plastic, and aluminum alloys. A good helper as a wood drill or other DIY drilling tool.