Seeknit Koshitsu BOX Interchangeable Circular Needle Tips Set — 12.5cm/5in

Japanese precision. Hardened bamboo. One tip length, three clearly defined sets.

The Seeknit Koshitsu interchangeable needle system with 12.5cm/5in tips is designed for knitters who want a balanced, versatile needle length that offers both control and comfort.
This product is offered in three configurations — S Set, M Set, and L Set.
Material, construction, and performance are identical. The only difference is the range of needle sizes included.

All components are manufactured in Japan by Kinki Amibari Co. using Seeknit’s proprietary Koshitsu-treated bamboo.

Needle tip length
All needle tips in all sets measure 12.5cm/5in.
This mid-length format provides excellent versatility: long enough for comfortable hand support, yet compact enough for efficient circular knitting across a wide range of projects.

Material: Koshitsu-treated bamboo
The needle tips are crafted from Japanese moso bamboo enhanced through a specialized heat and pressure treatment. This process:

• increases density and durability;

• improves dimensional stability;

• creates a smooth, refined surface;

• delivers precise stitch control while remaining warm and comfortable in the hands.

Compared to standard bamboo, Koshitsu bamboo feels firmer, more stable, and more controlled.

S Set — Contents (Small Sizes)

• Needle tip length: 12.5cm/5in

• Screw size: M1.8

• Needle tips included:

  • 2.50mm (US1.5)

  • 2.75mm (US2)

  • 3.00mm (US2.5)

  • 3.25mm (US3)

• Cords included:

  • 35cm/14in

  • 55cm/22in

  • 75cm/29.5in

• Accessories:

  • stoppers ×2

M Set — Contents (Medium Sizes)

• Needle tip length: 12.5cm/5in

• Screw size: M2

• Needle tips included:

  • 3.50mm (US4)

  • 4.00mm (US6)

  • 4.50mm (US7)

  • 5.00mm (US8)

• Cords included:

  • 35cm/14in

  • 55cm/22in

  • 75cm/29.5in

• Accessories:

  • stoppers ×2

L Set — Contents (Large Sizes)

• Needle tip length: 12.5cm/5in

• Screw size: M4

• Needle tips included:

  • 5.50mm (US9)

  • 6.00mm (US10)

  • 7.00mm (US10.75)

  • 8.00mm (US11)

  • 10.00mm (US15)

• Cords included:

  • 35cm/14in

  • 55cm/22in

  • 75cm/29.5in

• Accessories:

  • cord joint ×1

  • stoppers ×2

Smooth joins and rotating cables
The transition between bamboo tips and metal connectors is completely seamless. The transparent cables are flexible, memory-free, and feature a rotating joint that prevents twisting during knitting.

Who this system is for
This set is ideal for knitters who want a versatile interchangeable system centered around a comfortable mid-length needle tip.
The S Set supports fine-gauge work, the M Set covers everyday knitting, and the L Set is built for thicker yarns and larger stitches — all using the same premium materials and engineering.

Seeknit Koshitsu is a system where length, material, and millimeter all have purpose.

Please note:
Due to the nature of knitting tools, all needle sales are final. Returns or exchanges are not accepted.