The unique limit rings designs paired with bearing allows for flexible rotation, scratches on the surfaces of the wooden board and ensuring safe operating every time Integrate the functions of countersunk and reaming drills to meet various drilling needs, improve work efficiency, and simplify tool selection The 6.25mm round handle design is suitable for various power tool, ensuring stable fixation and improving drilling accuracy and control The is crafted from hard alloy, wear-resistant, and has smooth and smooth openings, which can maintain excellent drilling even in harder wood Five specifications of 2.8 / 3 / 3.2 / 3.5 / are available for use, suitable for various types of wood, Manufacturer: ERRORY