From Kinki Amibari - the oldest manufacturer of bamboo knitting needles in Japan (over 100 years!)

They have developed the interchangeable circular needle Seeknit CURVE, designed with a sleek, flowing form that embodies ultimate knitting comfort. Its smooth polished surface ensures seamless yarn movement, allowing you to experience the joy of knitting exactly as you envision. Needle sizes are laser printed into the needle tip, so they won't rub off. From beginners to seasoned knitters, this needle offers a whole new level of knitting pleasure.

The seamless connection between the bamboo needles and the stainless steel fitting is achieved through precision screws. The cords connect seamlessly to the fitting and includes a swivel function.

Two different screw sizes, M1.8 and M2, are used for the Seeknit Curve Interchangeable needles. Compared with conventional products, the selection of cords, joints, and stoppers has been made easier. M1.8 screws fit together with needle sizes 2 mm / US 0 to 3.25 mm / US 3 while the M2 screws are used for needle tips ranging in sizes 3.5 mm / US 4 - 10 mm / US 15. 

The use of durable and flexible nylon cord enhances your knitting experience. The swivel feature helps to keep the needle firmly in place and prevents knitting from twisting.

These 2.75 mm / US 2 regular length 5" needle tips are compatible with the Seeknit Curve M1.8 Swivel Cord for Tip Sizes 2 mm - 3.25 mm.