550 lb Paracord Survival Key Chain/Fob on Carabiner;

Special attention was given the design of these key-chains. The paracord is weaved between the carabiner and a strong, small key ring. Then a larger key ring is added thru the smaller key ring. This allows keys/rings to be added to the larger ring easily. This also prevents the cord from fraying when twisting the ring to add keys(Unlike other designs that weave the cord between the carabiner and a large ring alone)

They are called a "Survival" item because the cord can be un-weaved in a survival situtation, and used to build a shelter, build a rabbit snare, or just used to tie down items to your roof when you forgot to bring your tie-downs to the hard-ware store.