Function: The copper pipe expander is used for forging and connecting pipes. This copper pipe expanding tool prevents pipes from cracking and is primarily used for expanding copper pipes. During air conditioning installation, the pipe expander ensures high contact strength and remains stable even after prolonged use. High-Quality Material: This copper pipe expanding tool is made of durable bearing steel. The precision-machined teeth ensure safe handling, prevent slippage, and provide a perfect fit and long service life. Practical Accessory: This copper pipe expander uses thermal friction to create a positive connection. It increases the contact surface between the torch and the valve and maintains the ductility of the copper to prevent cracking. The package includes six accessories for different air conditioning pipe diameters: 7/8" (22.2 mm), 3/4" (19 mm), 5/8" (15.9 mm), 1/2" (12.7 mm), 3/8" (9.5 mm), 1/4" (6.3 mm). Easy to install: This handy pipe expander is compact, lightweight, and portable. A high-quality replacement for older tools, it allows for easy opening and connecting of copper pipes during air conditioning installation—a quick and simple solution. Versatile application: Ideal for air conditioning installations and connecting copper pipe expanders, these expanders adapt to different sizes, making them suitable for various tasks.