1、[Applicable Size] This pipe expander is suitable for 1/4in 5/16in 3/8in, 1/2in 5/8in, 3/4in, 7/8in pipes and can help you complete the expansion work very well. 2、[High Carbon Steel] The pipe expander is made of high carbon steel, with high hardness, no deformation after long term use, and is not easy to be damaged. 3、[Multiple Uses] Tube expansion tools are widely used in the maintenance of refrigeration equipment such as refrigerators, air conditioners, and freezers. 4、[Easy to Operate] The use of the expander is simple, and you can use it with a pistol drill with a power of more than 550W. 5、[With Storage Box] The tube expander comes with a storage box, you only need to put them in the box when not in use, which is convenient to carry and not easy to lose.