For use on all types of tailpipes, mufflers and exhaust systems Designed to quickly and easily straighten out clamp dents in mufflers and tailpipes A simple wrench turn expands the pipe for exhaust system repair and installation Works with all 1-1/8" to 3-1/2" inner diameter thin-wall pipes Drop forged, heat-treated Includes: Small Expander: 1-1/8" to 1-3/4" Medium Expander: 1-1/2" to 2-1/2" Large Expander: 2-1/8" to 3-1/2" (3) Spare sets of rubber O-rings Blow molded storage case