Fast and clever, this kit includes the main circular knitting needle sizes. Interchangeable: just change the tips or the cable to choose the desired size! All the needles are made of metal for use without hook. This kit contains:- 8 pairs of circular knitting needles: 3.5 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 7.0 mm and 8.0 mm 13 cm long. - 4 swivel cables: 60 cm, 2 x 80 cm and 100 cm. - 8 tips and 4 greenhouses. How do it work? 1/ I choose the length of the cable and the size of my needles. 2/ I screw my needles at the ends of the cable. In use of knitpro knitpro needles