Rocket The nickel-free Addi Lace Circular Needles have more tapered tips than the Addi Basic (Turbo) Circular Needles, which makes sliding into the tightest or most intricate stitches a breeze, thus making them especially suitable for lace knitting. They have the same handling qualities as the Addi Basic (Turbo) Circular Needles. The new nickel-free, silver colored material is a great improvement over the old brass needles. Circular needles in 40 cm (15.75 in) and 50 cm (20 in) lengths have shortened tips.