Black Bulk/loose (non-carded) Twisty key rings. 7" 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 various colors, click more from this group at bottom of page. Twisty length is measured with the Twisty open and laying in flat line.