Features: High speed steel countersink drill bit set with 4 flute design ensures fast, precise holes and includes a built in hole reamer for enhanced efficiency in woodworking and DIYer projects. Universally 6.35mm Hexagonal shank fits most drills, while removable stop collars and steel bit enable adjustable drilling depths and multiple materials compatibility. Professional carpenters, cabinet makers, and DIYer enthusiasts will appreciate its wear resistant construction for furniture assembly, cabinetry, and precisions drilling tasks. Effortlessly create clean holes in workshops or home renovation projects using the tool removal systems and quick to change bit conversion feature. Engineered for longevity with wear resistant 4 edges cutting tips and reinforced steel components, this versatile set combines industrial grade performances with user friendly adaptability. O Specifications: Component: Metal Shank diameter 6.35mm (1/4'') Color:Red,Silver Package Includes: 1Set Countersink Drill Bit note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.