Features: High concentricity precisions polising drill bit extension rod enables accurate deep hole drilling for woodworking and construction projects with its steel construction. Crafted from rusts resistant steel, this extension rod features vibration dampening stability and screws for secure, slip frees tool connecting. Ideal for professional carpentry, metalworkers, and DIY enthusiasts requiring extended reach in confined space during drilling operations. Perfect for creating depth consistent bores in large vases, window frame, and pipe bushings while maintaining precise alignment in challenging workspaces. The included hexagonal key ensures quick installation of the 1/4" shank adapters, transforming standard drill bit into deep hole boring tool for workshop efficiency. Specifications: Component: Steel Length:Approx.173mm/6.81'' Package Includes: 1Set Drill Bit Extension note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.