Easily identify your keys with these color-coded, write-on key identifiers. Bands are made of heat-shrink plastic and separate keys by color. Slide band over key head and apply heat. Band shrinks to form-fit the key head, providing a writable surface. To label, use a Sharpie or a preprinted label. Ideal for awkwardly shaped keys, when standard key caps will not work. Size Medium is ideal for standard size keys, such as house keys.