1,Using materials, it is made of durable high speed steel, strong and stable, not easily deformed, and has a long service life. 2,Simple to use, you only need to unfold the copper pipe when installing the air conditioner, this product can connect two copper pipes to each other. 3,Time saving and labor saving design, it only needs to be installed on the electric drill, it can effortlessly help you install it and apply it to the copper pipe. 4,Small in size, it is sturdy and portable, can be easily used in various situations, and will not take up extra space when storing. 5,Professional design, it is suitable for air conditioning installation, etc., and can be used on pipelines that need to be expanded or connected. 5 x Tube Expander Item Type: Tube ExpanderWeight: Approx. 315g / 11.1ozProduct Size: Approx. 96mm / 3.8in,86mm / 3.4in,85mm / 3.3in,87mm / 3.4in,89mm / 3.5inMaterial: High Speed SteelsScope of Application: It is suitable for air conditioning installation, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.