Feature: High strength and good toughness.Drop forged and heat treated steel construction for strength and durability.3 different sizes make it almost suitable for all kinds of pipes.A simple wrench turn expands pipe for exhaust system repair and installation.This tail pipe expander set is designed to quickly and easily straighten clamp dents in mufflers.Great for expanding pipes, plumbing, tail pipes duct work etc.Comes with a blow mold storage case, portable, easy to carry and transport. Specification: Material: Powder metallurgyColor: As shownSmall size: 1-1/8″ ~1-3/4″ (29~44mm), drive end: 16.8mmMedium size: 1-1/2″ ~ 2-1/2″ (38~64mm), drive end: 16.8mmLarge size: 2/1/8″ ~ 3-1/2″ (54~89mm), drive end: 18.8mPlastic box size: Approx. 270*180*65mm/10.6*7.08*2.55inNet weight: 2913g(w/storage case) Package Included: 1x Small Expander1x Medium Expander1x Large Expander6x O-ring1x Plastic box