Clover Interchangeable Circular Knitting Needle pair the the size cord and needle tips for your project. Tips twist onto the very flexible cords. No additional tools necessary. Takumi Combo Set- Create 60 combinations of circular knitting needles. Includes two each of 12 bamboo tip sizes: US sizes 3 through 15. Plus one each of 5 cords to create 16 24 29 36 and 48 lengths. Store in the exclusive luxury case.