EFFICIENT EXPANSION DESIGN: This manual tube expander is specially designed for air conditioners and refrigerator copper pipes, enabling quick and effective hole expansion to enhances work efficiency during repairs Sturdy ALUMINUM ALLOY: Crafted from sturdy aluminum alloy, it excellent wear resistance and resistance, ensuring long time in various repair environments : Features multi stage hole expansion to accommodate different pipe sizes, accurate and consistent results for every task USER FRIENDLY operations: Simple manual design requires without power or air source, making it for both craft users and professional technicians to use PORTABLE & SAFE: Compact and lightweight for easy carrying and operations in tight spaces, while strict testing ensures and reliability during use, Manufacturer: yanzunlrn