Features: This (6 piece set) air conditioner copper pipe expander comes in various sizes including 7/8", 3/4", 5/8", 1/2", 3/8", and 1/4". Perfect for different work scenarios. Crafted with high quality stainless steel, the forgedblade sleeve is rust resistant and features a hot rolled rotating system for friction forming. Designed for easy installation of air conditioners, simply expand the copper pipes and connect them together using this tool attached to a drill. Suitable for both professionals and DIY enthusiasts. This hexagonal triangular handle pipe expander is idealfor expanding and connecting copper pipes. It is widely used in mechanical processing, pipeline engineering, air conditioning system, and more. Ergonomically designed for comfortable grip and simple operation, even for beginners. With perfect depth and tights fit, these expansion blocks make brazing easier and reduce fatigue stress in the coupling area. Get your air conditioning projects done efficiently and reliably with this multi functional tool. Specifications: Material:High-Speed Steel Size:7/8（22.2mm） Size:3/4（19mm Size:5/8（15.9mm Size:1/2（12.7mm） Size:3/8（9.5mm） Size:1/4（6.3mm） Color:Black Package Includes: 6Pcs Swaging Tool note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.