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".
Ginger Long Tips Knitting Needle Set – gather here online
LYKKE Cypra COPPER Interchangeable 5 Set
Knitting Needles Tribe Yarns, London Grove - tribeyarns
LYKKE Blush Interchangeable 5 Set
LYKKE BLUSH Interchangeable 3.5 Set
ChiaoGoo TWIST 5 Interchangeable Set
ChiaoGoo TWIST 5 Interchangeable Set
LYKKE Long Interchangeable Knitting Needle Set
LYKKE Grove Bamboo Interchangeable 5 Set
Mindful Interchangeable Needle Sets — Starlight Knitting Society
LYKKE Grove Bamboo Interchangeable 5 Set
LYKKE Driftwood Interchangeable 5 Set
Knitter's Pride Ginger Interchangeable Circular Knitting Needles, Special Short Tip Set - Includes 13 Pairs of 4 Needle Tips in Sizes US 3 Through US 17
Zing Special Interchangeable Circular Needle Set – Premier Yarns
LYKKE Grove Bamboo Interchangeable 5 Set