Knitter’s Pride Karbonz Interchangeable Circular Deluxe Set includes 9 pairs of 4.5″ tips in US sizes 2.5, 3, 4, 5, 6, 7, 8, 9, and 10. The Karbonz needles have the spectacular flex and tensile strength of carbon fiber, the same material used in aerospace engineering, with a warm feel like wood. This set also includes 4 cables (one 24″, two 32″, and one 40″), 8 end caps, 4 cable keys, and a set of needle size ID tags, all organized in a fabric zippered case. It’s best to tighten your needles by holding the base. Click here to see how it’s done.