Feature: 1. This product is made of fine material, it has a long service life, you do not need to change it often. 2. When you need to install the air conditioners, you can use it to expand the copper pipes then make the two pipes interconnected. 3. It is very easy to use it, and can save your time and energy. 4. It is in small size, so you can take it with you to anywhere you want to use it. 5. Please notice, this tool need to installed on the electric hand drill to use it. 6. There are 5 size for you to choose, you can use the one you need. Specification: This is a set of tube pipes expander, it includes 10mm,12mm, 16mm, 19mm, 22mm this 5 size tool, it is useful for you to use it when you need to expend the pipes, it can save your time and energy, makes your work more easily, come on and try it, it will not let you down. Features: This product is made of fine material, it has a long service life, you do not need to change it often. When you need to install the air conditioners, you can use it to expand the copper pipes then make the two pipes interconnected. It is very easy to use it, and can save your time and energy. It is in small size, so you can take it with you to anywhere you want to use it. Please notice, this tool need to installed on the electric hand drill to use it. There are 5 size for you to choose, you can use the one you need. Specifications: Material: steel Color: black Size: 3/8 (10mm), 1/2 (12mm), 5/8 (16mm), 3/4(19mm), 7/8 (22mm) Package size: 100 * 60 * 20mm / 2.4 * 2.4 * 2.0in Package weight: 310g / 7.4ounce Packing list: 5 * Pipes Expander Package List: 5 * Pipes Expander