The package includes 2 HVAC maintenance vehicle tube expander tools. The tool features five sizes: 1/4 inch (6mm), 3/8 inch (10mm), 1/2 inch (12mm), 5/8 inch (16mm), and 3/4 inch (19mm). No need to switch between multiple tools. High quality: These drill bits are made of chrome vanadium steel, offering increased hardness and durability. Resistant to breakage and deformation, designed for long-term use. Practical and efficient: The copper tube expander supports both tube expansion and flaring functions. Ideal for air conditioning system maintenance. Easy to use: The 1/4 inch shank allows quick installation on an electric drill. Designed for convenient copper tube expansion and easy portability. Warning: Avoid direct contact during use as heat may be generated during operation. Widely used: Suitable for most copper pipes, including applications in air conditioning, refrigeration, and general copper pipe maintenance. Color: Black Material: Metal Package Contents: 2 x Tube Expander Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting effects and monitor settings may cause slight color variations between the image and the actual product. Measurement tolerance: +/- 1-3 cm.