The addi Click System is the standard of excellence in interchangeable needles. Featuring needle tips in sizes US 4 up to US 19, and cord lengths ranging from 16″ to 80″ and beyond, the addi Click System creates a huge variety of needles to satisfy just about any project. It also features addi’s patented Click technology for connecting tips to cords, which will never disconnect during knitting. It needs no tools to connect or disconnect. And as with all addi products, all Click System parts carry addi’s lifetime guarantee to be free from manufacturing defects.