Both professionals and home users can easily use and complete their work quickly The hexagonal handle can effectively slipping and is suitable for various electric and manual tool, providing a stable operating The small size design is suitable for small apertures requirements and is suitable for precisions engineering, electronic products, and daily projects High-speed steel, it is wear-resistant and has strong heat resistance, making it suitable for drilling holes in various materials such as metal and The unique stepped shape allows the drill bit to gradually enlarge the apertures, making it to complete multiple drilling holes of different diameters at once, Manufacturer: ERRORY