About This Wide Expansion Range: This exhaust pipe expander tool kit includes 7 collets to accommodate 1-5/8" to 4-1/4" exhaust pipes, suitable for low-carbon steel and stainless steel pipes with a wall thickness of up to 0.06 inch Professional Pipe Expansion: Precisely expands exhaust pipes to ensure tight, secure connections for smooth exhaust flow. A dependable tool for professional repair shops and home garages, delivering reliable results for exhaust system installation and repair Sturdy & Long-Lasting: Constructed with hardened carbon steel and lightweight aluminum, this exhaust pipe stretcher is built to withstand demanding working conditions and repeated high-force expansion Easy Operation: Before you start with the exhaust expander tool, please lubricate all the parts. Select the right collet, clamp the pipe, and expand it. For faster results, work with a 1/2" or 3/4" impact wrench to make your job easier Easy Portability: Housed in a rugged carrying case, this automotive tool kit for exhaust pipes is well protected against impacts and wear during transport and storage. Keep components securely organized and ready for use anytime