ARKSEN 3PC Exhaust Mufflers Tail Pipe Tailpipe Expander Enlarge Spreader Hand Tool Heavy duty pipe expander reshapes, enlarge muffler ends or pipes warped by heat and dented by clamps Designed for quickly and easily straighten out clamp dents in muffler and tailpipes Drop forged, heat treated harden steel construction Perfect for exhaust system repair and installation Large expander: 2-1/8" to 3-1/2" Medium expander: 1-1/2" to 2-1/2" Small expander: 1-1/8" to 1-3/4"