Feature: 1. A portable collet and expander are provided to stretch the tail end before tight sealing on smaller diameter pipes. 2. The exhaust pipe stretcher provides various gaskets, can be used for a wide range of expansion from 1‑5/8in to 4‑1/4in. 3. Including: steel expander 1 5/8in‑2in collet, steel structure 2in‑2 1/2in collet, 2 3/8in‑2 3/4in collet, 2 3/4in‑ 3 1/8in collet, 3 1/8in‑3 1/2in collet, 3 1/2in‑3 7/8in collet, 3 7/8in‑4 1/4in collet. 4. Choose the appropriate collet to clamp the pipe, and then use 1/2in or 3/4in impact wrench (not included) to save more effort. 5. Resistance to deformity under heavy load, save your time and energy, bring you more convenience with higher working efficiency. Specification: Item Type: Exhaust Pipe Expander Kit Aviation Aluminum + Alloy Suitable Pipes: Approx. 1-5/8 to 4-1/4in Application: Home DIY or auto repair shop Expansion Range: Approx. 1‑5/8in to 4‑1/4in Including: steel expander 1 5/8in‑2in collet, steel structure 2in‑2 1/2in collet, 2 3/8in‑2 3/4in collet, 2 3/4in‑ 3 1/8in collet, 3 1/8in‑3 1/2in collet, 3 1/2in‑3 7/8in collet, 3 7/8in‑4 1/4in collet. Box Size: Approx. 30x38x9cm/11.8x15x3.5in. Package List: 7 x Repair Tool1 x Plastic Box12 x Sealing Ring