Convenient Storage: Blow-molded carrying case included for easy storing and convenient carrying, no need worry exhaust pipe expander tool messing around and missing anymore. Heavy-duty Construction: All collets are made of Aluminum alloy ensuring rugged rigidity over an extended service life. The coated surface of the exhaust pipe expander kit provides rust resistance. Easy to Operate: You only have to lubricate all parts of the exhaust expander tool, and attach sleeves as needed, and then insert pipe spreader into the pipe, and finally connect to existing drill. Wide Expanding Range: The exhaust pipe stretcher kit provides various collets for a broad expansion range from 1-5/8" to 4-1/4". Includes: mild steel expander (1 5/8" - 1 7/8" collet, 2" - 2 1/2" chuck), and aluminum alloy expander (2 3/8"- 2 3/4" Collet, 2 3/4" - 3 1/8" collet, 3 1/8" - 3 1/2" collet, 3 1/2" - 3 7/8" collet, 3 7/8" - 4 1/4" collet). Exhaust Pipe Stretcher Kit: This pipe stretcher kit provides the handy collets and expander required to stretch tailpipes before making tight seals to pipes with smaller diameters.