Pipe Stretcher Kit 1-5/8" to 4-1/4" 1-5/8" to 4-1/4" & Hydraulic System & 10 T The exhaust pipe expander stretcher tool set is convenient. A 10-ton manual hydraulic system with 4 feet hose makes pipe expansion work effortless. Collet sets expand pipes from 1-5/18" to 4-1/4", so they can be used on most vehicles. Wide Expanding Range Labor-saving Hydraulic System Easy to Install & Operate Heavy-duty Construction Convenient Storage 1 x Hydraulic Pipe Expander 7 x Collet 1 x Drive Expanding Tool 1 x Bearing Set .