Servicing exhaust pipes has never been easier. Working with exhaust pipes requires a special tool to move and smooth metal pipes evenly easily. The Powerbuilt Large Tailpipe Expander Set is a specialty tool that expands exhaust pipes rounding pipe ends, and removes exhaust clamp grooves. The large alloy steel expander works on 2-1/8 inch to 3-7/8 inch internal diameter exhaust pipes. Set the needed diameter with the lock nut and snap ring, insert the expander, and turn the heavy-duty hex bar with your ratchet. The Tailpipe Expander Set meets or exceeds ANSI standards and comes with a lifetime warranty.