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. Size Large is ideal for larger-headed keys, such as office keys.