[Size]: The pipe expander tool includes 11 sizes: 3/4 Inch, 5/8 Inch, 1/2 Inch, 3/8 Inch, 1/4 Inch, S 7/8, S 3/4, S 5/8, S 1/2, S 3/8, S 1/4 [Material]: The copper pipe reamer is constructed from carbon steel, offering durability, wear resistance, and protection against rust. Designed for long-term use. [Working Principle]: This tool expands soft copper pipes through drill bit rotation, enabling secure, leak-free connections between copper pipes. Provides effective performance when used with drill bits and impact drills. For best results, maintain a moderate drilling speed. [Easy to Use]: Select the appropriate expansion head based on the copper pipe diameter. Begin by using the tip of the expander to prevent edge cracking, then insert the full expansion head into the pipe and apply consistent pressure until the flared edge is formed. [What You Get]: This flaring tool kit includes 6 straight hole expanders and 5 flared hole expanders Model: 3/4 Inch, 5/8 Inch, 1/2 Inch, 3/8 Inch, 1/4 Inch, S 7/8, S 3/4, S 5/8, S 1/2, S 3/8, S 1/4 Quantity: 11 pieces Handle Type: Hexagonal handle Surface Treatment: Black oxidation Packing Quantity: Mixed set Application: Suitable for copper and aluminum pipes Color: As shown Material: Carbon steel Package Contents: 1 x Copper tube expander set Note: The package includes only the items listed above. Other accessories are not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement may vary by +/- 1-3 cm.