Turbo Sizes 5-9Addi Turbo, the circular needle that started it all, and the true choice of professional knitters worldwide! The addi Turbo needles feature nickel plated brass tips, ultra pliable cords, snag free joins and a Lifetime Warranty from manufacturer's defect. Turbos feature the most rounded of needle tips, and this works very well for miles of garter stitch or stockinette stitch.