EFFICIENT EXTENSION DESIGN: This manual tube extender is specially designed for air conditioning and refrigerator copper pipe, expands the holes quickly and effectively to improve the work efficiency when repairing USER FRIENDLY OPERATION: Simple manual design requires no power or air source for both craft users and professional technicians : Multi-stage hole extension for various pipe sizes for precise and consistent results for every task PORTABLE & SAFE: Compact and lightweight, easy to carry and operate in tight spaces, rigorous testing ensures reliability during use DURABLE ALUMINUM ALLOY: Made of durable aluminum alloy, excellent abrasion resistance and long-term use in a variety of repair environments, Manufacturer: Netbiio