Features and Benefits: Use with an impact wrench to quickly stretch pipes Two collet sets fit pipes from 1 5/8 to 2 7/16 Can be used on or off the car The pipe stretcher is a convenient inexpensive alternative to hydraulic pipe expanders Additional collets (5) extend range to 4-1/4 Use with an impact wrench to quickly stretch pipes. Two collet sets fit pipes from 1 5/8 in. to 2 7/16 . Can be used on the car. The pipe stretcher is a convenient inexpensive alternative to hydraulic pipe expanders. Additional collets (5) extend range to 4 1/4 . (Not included in 34400 set.)