Wall-Clock ‘XT500’ DIY Kit for Self-Assembly, incl. side cover, aluminium cover, quartz clockwork excl. battery (requires 1x type Mignon/AA) The XT500 side cover clock is supplied as a kit. The assembly is very simple: Place the aluminum cover on the side cover and mark the 11 mounting holes and the center hole. Remove the aluminum cover and drill the marked holes with a 3mm / 9mm (wood) drill bit. Finish the surface of the two raw aluminum sheets as desired, e.g. apply a sanding stroke or polish them Screw the aluminum cover, close the lock opening with the round aluminum cover and the adhesive pad Insert the movement and mount the hands Wall mounting can be done on the two upper tabs