Bamboo Interchangeable Circular Knitting Pins from Pony. 

Case includes:

9 pairs of shanks in sizes 3.25mm, 3.75mm, 4.00mm, 4.5mm, 5.00mm, 5.50mm, 6.00mm, 6.50mm and 7.00mm.

3 Cable Lenghts for 40cm, 60cm and 80cm Circular Pins. 

4 Clour coded adaptors to combine cable and create 100cm and 120cm circular pins.

Knitters Gauge.

2 pairs of colour coded knobs.

Shanks and cable included can also be used to make 9 pairs of flexible knitting pins.

Needles are made of Bamboo with screw thread conector in brass.

Comes in lovely fabric case made of hand woven cotton.