The XK-A-556-R is a pack of 10 key blockers. Key blockers take the place of any single key on an X-keys XK series device and leave a flat surface at case top height for a professionally finished look. These key blockers friction fit into the XK series deck and may be removed or swapped with keycaps to modify or update a key configuration. It is recommended to remove the key plungers on your XK series X-keys before applying the key blockers.
Please note these are for XK and XKE series X-keys only. They also have key blockers to fit their Classic X-keys with the Cherry MX switch.