Keychain lights are the most compact light we offer. Keychains are a great, convenient place to carry a light without space being an issue. Keychain lights fit right in with ones car keys for simple, on-the-go illumination. Applications include searching through the crevices of a car for spare change to navigating around the gopher holes in your friend's backyard. These lights allow you to have a useful too in a handy position at all times.