Extension-Bar-for-Impact-Screwdriver-Bits-150mm-Irwin-1923502-p-The-Irwin-Extension-Bars-are-specifically-engineered-for-use-in-high-torque-impact-drivers-They-have-a-patented-jaw-design-which-is-compatible-with-all-1-4in-hex-shank-accessories-&-their-quick-change-shank-is-designed-to-withst&-slipping-in-standard-drill-chucks-p-p-Size-2-5in-p-IRWIN-1923502-Extension-Bar-for-Impact-Screwdriver-Bits-63mm