Specification: Item Type: Interchangeable Circular Knitting Needles Set Material: Stainless Steel, Cloth, Plastic Specification: One Set Product Use: Household, Weaving, etc. Scope of application: eligible people for most ages Rings Needle size: (Approx. 2.75 mm / 0.1 inch, Approx. 3.25 mm / 0.13 inch, Approx. 3.5 mm / 0.14 inch, Approx. 3.75 mm / 0.15 inch, Approx. 4.0 mm / 0.16 inch, Approx. 4.5 mm / 0.18 inch, Approx. 5.0 mm / 0. 20 inch) x2 How to use: 1. To start using the needle, screw the desired length of cable onto the hollow metal part of the needle. 2. Screw the threaded end of the cable onto one end of the hollow needle. 3. Do the same with the second needle on the other end of the cable. 4. To secure the cable to the pins on both sides, use the cable wrench on the sleeve. 5. Insert the cable wrench into the hole on the cable and tighten the cable and pin together like a handle. 6. Follow the same process for the other pin and the other side of the cable. 7. Please check to make sure it is tight and the needle is prepared. 8. When you want to change the size or use your needle in another project. Separate the cable and the needle by loosening both parts. 9. Insert the cable wrench into the cable hole and unscrew the cable from the needle. 10. Using the wrench as a handle, carefully unscrew the cable needle. 11. Take the same route on the other needle. 12. After carefully unscrewing the cable needle, use the corresponding hat to prevent the knitted item from slipping off the cable. 13. Screw the threaded portion of the end cap onto the end of the cable and tighten it. 14. Follow the same process on the other side of the cable, the other side of the cable should also be closed. Package List: 1 x Double Ended Hook. 1 x double-sided graduated ruler 3 x yellow thread for circular needle 3 sewing needles. 2 x circular needle connectors 2 x T-pins 14 x detachable circular pins 1 x removable circular needle storage bag 1 x anti-slip gasket 1 x English user manual