addi Turbo is the circular needle that started the addi story and is now the true choice of professional knitters worldwide. The Turbo knitting needles feature nickel plated brass tips, ultra-pliable cords and snag-free joins. Sizes are listed in approximate US sizes -AND- exact metric sizes for your convenience. All addi knitting needles are manufactured to exact metric sizes. Please Note: Every addi product purchased from an Authorized addi Dealer comes with a Lifetime Warranty from any manufacturer's defect.