The black Icron Raven Mounting Kit is designed to work with the Raven 3104 CAT 6a/7 Extender System or Raven 3124 Fiber Extender System. The bottom of the Raven enclosure features four pre-drilled holes, which is where this mounting kit fits in. This mounting kit includes two mounting brackets, four locking washers for M3 screws, and four Phillips M3 x 10mm screws. Please note that one kit will work with either the LEX unit or the REX unit. To mount both units, you will need two of these mounting kits.