[Size]: The pipe expander tool has 11 sizes: 3/4Inch, 5/8Inch, 1/2Inch, 3/8Inch, 1/4Inch, S 7/8, S 3/4, S 5/8, S 1/2, S 3/8, S 1/4 [Material]: The copper pipe reamer is made of metal, which is not easy to break, wear-, prevents the pipe drill bit from rusting, and has a long service life. [Working Principle]: The soft copper pipe is expanded by the rotation of the drill bit, so that the two copper pipes are connected without leakage. More effective than circular reamers when used in combination with drill bits and impact drills. (The drilling speed should not be too fast) [Easy to Use]: According to the diameter of the copper pipe expander, select the corresponding expansion head to install. To prevent cracking at the edges of the tube, the tip of the expander should be used to expand the tube. Then insert the entire expansion head into the copper tube and apply even force until the cup mouth is formed. [WHAT YOU GET]: This flaring tool kit contains 6 straight holes, 5 flared holes 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:11pcs Handle type:hexagonal handle treatment:black oxidation Packing Quantity:mixed set Application:copper pipe/aluminum pipe Colour:As Shown Material:Carbon Steel Package Contents: 1 * copper tube expander set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.