Purple Bulk/loose (non-carded) Twisty key rings. 5" nylon coated Twisty Key Ring. Lucky Line - Twisty Key Rings. Strong, flexible, corrosion-resistant aircraft cable key ring. Unique patented locking mechanism assures keys stay put. Crimp for permanent closure. Use as a key ring or binder ring to hold products or documents together. Nylon coated cable available in black, see sku: 35701. blue, clear, green, purple, and red. Twisty length is measured with the Twisty open and laying in flat line.