Features Efficient Pipe Expansion: Designed to expand copper pipes during air conditioner installation, ensuring a secure connection between two pipes Versatile 6-Piece Set: Includes 6 different specifications of tube expanders to accommodate various air conditioning maintenance needs Steel Construction: Crafted from high-quality steel, offering excellent oxidation resistance and long-term reliability for extended use and Time-Saving: Features accurate positioning for quick and easy use with hand drills, significantly reducing your working time Wide Compatibility: Suitable for expanding copper pipes with diameters ranging from 5mm to 20mm, providing flexibility and stability in various applications Features: 1、Used to expand the copper pipe when installing the air conditioner, so that the two copper pipes are connected to each other. 2、The kit contains 6 different specifications of tube expander, which can meet the different needs of air conditioning maintenance. 3、Made of excellent steel, has good oxidation resistance, and not easy to after long？term use. 4、These tube expanders are accurately positioned and can be used with hand drills to save working time. 5、Wide pipe expansion range, suitable for use with 5？20mm diameter copper pipes, flexible and stable . Specification: Item Type: Tube Expander Set Material: Steel Specification: 1/4in, 3/8in, 1/2in, 5/8in, 3/4in, 7/8in Expansion Range: Suitable for the use of approx. 5-20mm / 0.2-0.8in diameter copper pipes Package List: 6 x Tube Expanders Package List 6 x Tube Expanders