The present subject matter relates to method(s), system(s) and device(s) for cladding of materials, and in particular to an undercut clip anchor system. The system comprises a horizontal rail which mounts both an upper undercut clip and a lower undercut clip for attaching an upper cladding panel and a lower cladding panel, respectively. Serrations on the undercut clips and on a nut bar serrated washer allow for the accurate vertical adjustment of the cladding panels.