General description The CSPARKV 5pcs Tube Expander Set is designed for HVAC installers to efficiently expand air conditioning copper pipes. This versatile tool set includes five different expansion sizes, making it suitable for various copper pipe expansion needs. Technical specifications Expansion sizes: 3/4", 5/8", 1/2", 3/8", 1/4" Hexagonal shank size: 6.35mm Material: High-carbon steel Compatibility and accessories Compatible with standard hexagonal shank electric drills Installation Easy to use for expanding copper pipes during air conditioner installation Usage Facilitates accurate and perfect connection of two copper pipes Other information Compact and lightweight design for easy portability and storage Durable construction for long service life