Addi® Swing Crochet Hook Set. A favorite among crochet hooks, the ergonomic addi® Swing Hooks have just a hint of flexibility and fit right into the curve of the hand to allow for a more comfortable practice. The Fine addi® Swing Hooks comes with approximate US sizes 18, 16, 14, 12, 10, 8 & 6 (0.5mm-1.75mm) in a portable snap-closed, addi® case.