The Lisle Pipe Stretcher Kit, No.17350, stretches pipe up to 4-1/4", including stainless steel. Use with 1/2" or 3/4" impact wrench to quickly stretch pipes. Collet sets expand pipes from 1-5/8" to 4-1/4". The tool can be used on the vehicle and is a convenient, inexpensive alternative to hydraulic pipe expanders. If necessary, choose appropriate aluminum adapter to use with the standard expander tool. Be sure to keep threads and cone well lubricated. Comes in a plastic, blow-molded storage case.