Ergonomic design: The metal-aluminum knitting needles are and the ergonomic interchangeable handles provide a comfortable knitting experience. They help reduce hand fatigue even after long hours of knitting. Complete Knitting Kit: The knitting kit includes 13 pairs of 4-inch circular knitting needles in the following sizes: 3 mm, 3.25 mm, 3.5 mm, 3.75 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm. Also included are 4 cables of different lengths: 15.6 inches, 23 inches, 31.5 inches and 40 inches, 4 anti-stripping end caps, 2 cable keys, 2 couplers, 1 non-slip pad and 1 leather storage pouch. Interchangeable and flexible: This set of knitting needles features interchangeable needles for flexibility in meeting the knitting needs of small to large projects. PREMIUM QUALITY Material: These circular knitting needles are made of smooth and aluminum to long-lasting performance. that yarn passes easily through the knitting needles and the smooth design allows for easy sewing. IDEAL GIFT: The set comes with a beautiful leather storage bag, and the compact carrying case keeps circular needles and accessories neatly organized for travel