Twisty key ring made of strong flexible corrosion-resistant aircraft cable. The patented locking unit is opened and closed by forming a figure 8. Nylon coated cable in assorted colors: Clear black blue green red and purple. 5 inches long. 1 per card. WARNING: This product can expose you to chemicals such as Nickel which is known to the State of California to cause cancer andor birth defects or reproductive harm. For more information go to www.P65Warnings.ca.gov - Nickel (Metallic)