A key labeling system and method of promotional advertising through distribution of labeled key head covers enables free distribution of a labeled key head cover to potential consumers for personal use, whereby, the potential consumer frequently views advertisements, messages, and logos that display on the key. The method is also marketed to promotional catalogues. The labeled key head cover comprises a circular-shaped sleeve having a first face, a second face, an inner cavity for retaining the key head, a through opening to fit around the key head, and a resilient material fitting around the key head. The first face comprises a printed promotional indicia that can include: an advertisement, a contact identifier, a promotion, a trademark, a product name, a business name, and a logo. A gap forms in the second face of sleeve for receiving and viewing an insert label that can be marked and customized by the consumers.

A cover for a key is disclosed. The cover includes: a first wall; a second wall opposite to the first wall; and an outer wall extending between the first wall and the second wall, the outer wall defining a pair of slots extending therethrough, the slots being positioned opposite to each other on the outer wall, wherein the first wall, the second wall, and the outer wall define a closed chamber for receiving a bow of the key and an opening to the chamber.

A cover for a key is disclosed. The cover includes: a first wall; a second wall opposite to the first wall; and an outer wall extending between the first wall and the second wall, the outer wall defining a pair of slots extending therethrough, the slots being positioned opposite to each other on the outer wall, wherein the first wall, the second wall, and the outer wall define a closed chamber for receiving a bow of the key and an opening to the chamber.

A locking key for changing a locked state by being inserted into a key box includes a first base including a metal complex and in which a first pattern groove is formed, and a first pattern provided in the first pattern groove and including a conductive material.

A locking key for changing a locked state by being inserted into a key box includes a first base including a metal complex and in which a first pattern groove is formed, and a first pattern provided in the first pattern groove and including a conductive material.

A cover for a key is disclosed. The cover includes: a first wall; a second wall opposite to the first wall; and an outer wall extending between the first wall and the second wall, the outer wall defining a pair of slots extending therethrough, the slots being positioned opposite to each other on the outer wall, wherein the first wall, the second wall, and the outer wall define a closed chamber for receiving a bow of the key and an opening to the chamber.

A cover for a key is disclosed. The cover includes: a first wall; a second wall opposite to the first wall; and an outer wall extending between the first wall and the second wall, the outer wall defining a pair of slots extending therethrough, the slots being positioned opposite to each other on the outer wall, wherein the first wall, the second wall, and the outer wall define a closed chamber for receiving a bow of the key and an opening to the chamber.

A key cover includes a body, the body including an aperture, the aperture shaped for receiving a key. The key cover further includes a flap, the flap interconnected with the body, the flap shaped such that the flap is foldable to an interior area of the body, the interior area is larger than the aperture, and the aperture leads to the interior area.

A key cover includes a body, the body including an aperture, the aperture shaped for receiving a key. The key cover further includes a flap, the flap interconnected with the body, the flap shaped such that the flap is foldable to an interior area of the body, the interior area is larger than the aperture, and the aperture leads to the interior area.

Some of the inventive concepts described herein include a data key having a computer readable medium containing information indicative of a bitting pattern for a master key. The bitting pattern on the data key may be downloadable to a key cutting device to cut a duplicate key that has the same bitting pattern as the master key. In addition, a method of creating a data key is also provided herein. The method includes identifying a type of key; identifying a bitting pattern; and storing the type of key blank required and bitting pattern to be cut in the key blank on a computer readable medium.