A mechanical key includes a key pattern recessed in the mechanical key in a thickness direction and key segments separable in the thickness direction. At least one of the key segments includes a key pattern slit. The key pattern slit extends through the at least one of the key segments in the thickness direction and is shaped in conformance with the key pattern.

A means for holding a plurality keys is disclosed. The means comprises: a flat card rectangular in shaped, one or more fold lines in order to divide the card into a plurality of panels. The fold lines wherein allow the plurality of panels to pivot relative to each other by 180-degree angle. One or more panels of the card comprise a sleeve which has one or more openings to facilitate the insertion of keys.

The invention is a flat card structure having one or more holes through its planar surfaces enabling one or more keys to be bound to the flat card structure using two-part attachment fixtures. The keys on each planar surface are coplanar in a plane parallel to the card's planar surface. The keys may be rotated so as to be used to open a lock, and then rotated back into stored position wherein no key portion extends beyond the card's dimensions. The card with keys attached and in stored position can fit in card pockets of wallets and card cases.

The multiple key fob holder is a case which stores a plurality of key fobs. The multiple key fob holder comprises a base, a cover, a master fastener, and a cord loop. The base and the cover form an enclosed containment structure within which the plurality of key fobs are contained. The base and the cover attach such that the cover rotates relative to the base. The master fastener attaches the base to the cover such that the containment structure can be secured in a closed position and unsecured to form an open position. The cord loop is a loop structure positioned at a location selected from the group consisting of: 1) the interior of the containment structure when the multiple key fob holder is in a closed position; and, 2) the exterior of the containment structure when the multiple key fob holder is in an open position.

A key holder includes a key tag, the key tag attached to a key. The key holder further includes a device body, the device body including a slot, the key located in the slot of the device body and the key tag wrapping around the device body from the slot to an outer portion of the device body, the outer portion of the device body including an attachment point for the key tag, the key tag attached to the outer portion of the device body and under sufficient tension to prevent the key from sliding out of the slot.

A key holder includes a key tag, the key tag attached to a key. The key holder further includes a device body, the device body including a slot, the key located in the slot of the device body and the key tag wrapping around the device body from the slot to an outer portion of the device body, the outer portion of the device body including an attachment point for the key tag, the key tag attached to the outer portion of the device body and under sufficient tension to prevent the key from sliding out of the slot.

A mechanical key includes a key pattern recessed in the mechanical key in a thickness direction and key segments separable in the thickness direction. At least one of the key segments includes a key pattern slit. The key pattern slit extends through the at least one of the key segments in the thickness direction and is shaped in conformance with the key pattern.