TROIKA Keyring FREEKEY® SYSTEMKeyring, patented FREEKEY® SYSTEM, fingernail-friendly, 3 rings, stainless steel, matt, silver-colouredFingernail protector Need to change keys? It is a task that drives cautious fingernails to take cover. Luckily there's now FREEKEY®, the patented key system from Sweden. Gentle pressure on the marking is all that is required, and the arched ring opens with elegant ease. And before fingernails are put to the test, the keys have already been replaced or new keys securely added to the ring.