Interchangeable needles offer the most flexibility. The needle tips and cables are separate components so you can chop and change as necessary without having to purchase every needle+cable configuration. "Set".
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LYKKE Colour Interchangeable 5 Set
Ginger Long Tips Knitting Needle Set – gather here online
LYKKE Driftwood Interchangeable 5 Set
ChiaoGoo TWIST 5 Interchangeable Set
LYKKE Driftwood Interchangeable 5 Set
LYKKE Colour Interchangeable 5 Set
Interchangeable Circular Needles Tribe Yarns, London Set - tribeyarns
LYKKE BLUSH Interchangeable 3.5 Set