Construction: Crafted from high-strength alloy steel, this flaring tool is designed to withstand the rigors of professional use while providing excellent resistance to rust and wear, ensuring longevity and reliability in your toolkit. Comprehensive Multi-Function Kit: The expansion tool set includes a neatly organized storage box, making it easy to transport and access all components, which include 4 styling heads, 1 reamer, and 2 chucks, enhancing your efficiency on the job. Precision Engineering: Featuring a chrome-plated rotary adapter and flared cone made from the strongest steel, this kit offers 9 reaming sizes with an expansion range of 3mm to 19mm, allowing for highly accurate and tailored flaring solutions. Ergonomic Design: Designed with user comfort in mind, the tube expander includes a comfortable grip that minimizes fatigue during extended use, complemented by a labor-saving mechanism for effortless operation. Versatile Applications: Good for flaring brass, copper, and aluminum tubes, this tool kit is perfect for various household appliance repairs, including air conditioners and refrigerators, making it a valuable addition to any mechanic's arsenal.